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Discussion Starter · #1 · (Edited)
Monolith by Monoprice HTP-1 16-Channel Dolby Atmos, DTS:X, Auro-3D Home Theater Processor with Dirac Live & Alexa Compatibility
Overview

The Monolith™ HTP-1 is an "AVR" or "Pre-Processor" designed for use in home theaters. It supports Dolby Atmos®, DTS:X®, Auro-3D®, and Dirac Live®. It features eight HDMI® Ultra High Definition (4K UHD) inputs and two HDMI 4K UHD outputs. It has seven digital audio inputs, two stereo analog inputs, one secondary stereo analog output, and sixteen balanced XLR analog outputs. It has a built-in web GUI, which allows you to configure it using a computer, smartphone, or tablet, as well as an infrared remote control for adjusting volume, changing the upmix, and selecting inputs. It is designed for easy software updates using an Ethernet connection.



Product Page
Monolith by Monoprice HTP-1 16-Channel Home Theater Processor with Dolby Atmos, DTS:X, Auro-3D, Roon Ready, and Dirac Live Bass Control Compatibility - Monoprice.com

Owner's Manual

https://downloads.monoprice.com/files/manuals/37887_Manual_200124.pdf (1/24/2020)


Specifications
Model HTP-1
Part Number 38788
Video Inputs 8x HDMI®
Audio-Only Inputs 2x analog stereo RCA, 3x digital coaxial, 3x digital optical, 1x AES/EBU, 1x ARC/eARC
Streaming Inputs USB audio, Bluetooth®
Video Outputs 1x HDMI ARC/eARC, 1x HDMI
Audio Outputs 16-channels balanced XLR line outputs, unbalanced stereo analog RCA
Triggers 1x trigger input, 4x trigger outputs
HDMI Version 2.0
HDCP™ Version 2.3
Maximum Video Resolution [email protected] UHD
Audio Frequency Response 20Hz ~ 20kHz
Supported Audio Codecs Dolby Atmos®, Dolby TrueHD™, Dolby Digital®, Dolby Surround®, DTS:X®, DTS Neural:X®, DTS-HD Master Audio™, Auro-3D®, Auro-Matic®
Crossover Variable 4th order Linkwitz-Riley
Room Correction/Equalization Dirac Live® (licensed with HTP-1 ownership); Dirac Bass Management Module to be added
DACs 1 AK4493 for every 2 channels
Built-in Audio Correction Bass and Treble tone controls, 16-band parametric equalizer with independent speaker control on each band
Connectivity Wired 10/100Mbps Ethernet, Wi-Fi®
Input Power 100 ~ 240 VAC, 50/60 Hz
Dimensions 17.1" x 5.7" x 12.0"
 

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Discussion Starter · #2 · (Edited)
Firmware and Version History
Latest Stable Version
: 1.4.2 (August 13, 2020)
Release Notes:
Welcome

Congratulations on your purchase of the HTP-1 and welcome to software release version 1.7.1. Version 1.7.0 was a major update. Version 1.7.1 is a minor improvement on V1.7.0.

The HTP-1 is easily updated via its network connection and also easily reverted back to any previous releases so you are not stuck with an update that you don’t like.

This release note describes the state of the current software release.

The basic audio and video handling of the HTP-1 is quite stable. You should not expect crashes. You should be able to play any audio source that can arrive over HDMI. Control over a wired network is very stable. A detailed user guide is available via the help buttons on the device as well as on the Monoprice web site. Goto the HTP-1 product page and search for “User’s Manual”. The version of the user guide updated to match the current software release is accessed via the help menu on the HTP-1, or from this direct link: Monolith HTP-1 User Guide.pdf

If you need technical support, you should contact our technical support department directly for the fastest response using one of following methods:
web/chat: Support
email: [email protected]
phone: 877.271.2592 Monday - Friday: 6:00AM - 5:00PM PST


While the developers see the notes sent on the feedback page, the developers cannot easily respond to feedback that doesn’t include an email address. The support site is better for support issues.
HTP-1 Release Notes, version 1.7.1

August 13, 2020 Version 1.7.1 is created to clean up a few minor issues noted by early adopters of v1.7.0
New Features and Updates:

  • Dirac filters from V1.5 and previous are now loaded and executed correctly.
  • Exiting the Dirac Live program at various points does a better job of restoring the entire state.
  • The Dirac button state now stays in sync with the processing even when loading a new filter.
  • When a Dirac filter is active and you edit the user delay, the result is now accurate. Previously it was wrong until you reloaded the filter.
  • The Tone Control now applies cleanly to all channels.
  • A sine wave source is added to the signal generator.
  • If the DNS server is not set, the update system uses a default and warns the user. This case previously blocked updating.
HTP-1 Release Notes, version 1.7.0

August 5, 2020
New Features and Updates:

  • This version introduces support for Dirac Live Bass Control (DLBC). The Dirac handling code is extensively updated.
    Users who have a Dirac license for DLBC can try it out. Without the updated Dirac license you should still be able to choose between the Dirac bass manager and the Monoprice bass manager.
  • Dirac Bypass: The Dirac button now toggles between three states. On and Off work as expected. The new “bypass” state applies the delay and trim but not the filter. One of our power users has suggested arranging preset buttons with the preset recorder to switch directly between on and bypass.
  • The signal generator page is active and described in the updated user guide. Choices include band limited pink noise and external inputs.
  • Roon update: Roon now turns on and off correctly when navigating to or away from the Roon input. It also displays the signal processing chain.
  • The “input sensitivity” control is renamed to “Maximum Output Level” and the user guide is updated to reflect this definition.
  • The “Wide Synth” control button is moved from its association with DTS Neural-X to apply to all modes except “direct”. The user guide is updated to better describe its action. The level of the mix is reduced from -3dB to -6dB.
  • The range of the tone control corner frequencies are increased.
  • The user interface to “user trim” is updated to match the system’s half dB resolution. Previously you could adjust the UI by .1dB, but the system only changed at half dBs.
  • Neural-X malfunction update: Using Neural-X, it was possible to get the system into a state of silent output with Neural-X and DTS-ES 6.1 tracks. This is corrected.
New Known Issues:

  • Note that Dirac presets saved in HTP-1 using v1.7 will not be recognized and will be overwritten by v1.5 and earlier HTP-1 versions. Take care to ensure that your new Dirac work is saved in the Dirac Live tool before reverting.
Existing Issues:

  • Play a truly mono movie (Casablanca) on a system with no center channel. Turn on Dolby Surround. There is no sound, as it is improperly beinh directed to the missing center speaker. This has always been the case.
  • It has been noticed that the Chrome browser on Android phones can get in a state where the setup dialog box won’t close. Restarting the Chrome browser with the latest updates seems to resolve the issue.
HTP-1 Release Notes, version 1.5.1

May 7, 2020

This version contains a small number of updates to the video system. The audio system is unchanged.

  • With the HTP-1 on and rendering audio from a source, disconnecting a TV or powering off some TVs would result in the loss of audio from the HTP-1 (assuming the source is still provided audio content). This behavior has been improved so there should only be a short loss of audio and then audio will continue to be rendered as long as the source continues to provide audio.
  • There has been a minor adjustment to the eARC link startup message exchange which should improve eARC compatibility with some systems.
  • The order of audio descriptors in the EDID has been changed to list the most preferred formats first. This also applies to the list of audio descriptors provided to a TV over eARC.
  • The EDID block is adjusted so that PC sticks will boot while connected.
HTP-1 Release Notes, version 1.5

April 22, 2020
The changes in this version are:

  • Updated kernel and drivers to prevent buffer underrun that causes audible artifacts when listening through Roon and Bluetooth.
HTP-1 Release Notes, version 1.4.3 HTP-1 Release Notes, version 1.4.2

April 7, 2020 Release version 1.4.3 rolls a collection of changes that have been tested in recent weeks.
Summary of changes in V1.4.3:

In addition to the changed described below in V1.4, this version is characterized by the significant changes:

  • EQ page includes selection of shelf filters supporting the third party “BEQ” application.
  • The network interface is enhanced to be friendly to a third party “macro recorder” that can be used to make presets.
  • The EQ page includes a control to adjust the calibration of Loudness.
    • The user guide is updated to describe the calibration of loudness.
  • Improved muting to silence “pops” when changing inputs or stream status.
  • Correctly restore volume with some DTS streams after muting.
  • Ensure that 5.1 PCM streams remain identified as 5.1.
  • Remove red (mute) color from volume display when volume is changed.
  • Turn off wide synth in direct mode.
    • Disabled false indication of wides in Dolby Surround so that “wide synth” can apply.
Known Issus in V1.4.3:

The HTP-1 software team expects to continue updating this product for some time. The team expects to address the list of open issues.

  • #602: The Dirac Live tool does not reliably receive a description of the slots in use on the HTP-1.
  • #523: Glitches remain in the audio stream from BlueTooth and Roon. A fix for this has been tested in house and rollout will begin soon.
  • #598: Noises when changing volume with loudness on. Most notable when heavy bass content is played with much boost.
  • #540: USB Audio (USB DAC function) not yet supported.
  • #548: Roon compliance not complete.
  • #518: WiFi causes dropouts on BlueTooth. Turn off WiFi to use BlueTooth.
  • #538: Dirac Live may not find HTP if both WiFi and wired connections are active.
  • Work continues on DTS-X Pro and Dirac Bass Control.
  • Alexa Smart Home Skill has not yet been certified by Amazon so you cannot find it in the Alexa stores.
Earlier HTP-1 Release Notes
V1.4

March 10, 2020

The changes in this version were:

  • Support up to 5 subwoofers. Note that Dirac v2.4.1 erroneously says it only supports one sub. Tests with the Dirac team show that this error message can be ignored. The User Guide is updated to give more information on managing multiple subs.
  • The speaker configuration page now limits the number of speakers to 16 and reports when more speakers are attempted.
  • The volume control responds more quickly.
  • The limit of -30 is removed from the power on volume setting. Set it where you like.
  • Bug 526 (no sub leads to mono L/R/C) is fixed.
  • A power down button is added on the main page.
  • The secondary output is enabled.
  • A factory reset forces a browser reload.
  • The “feedback” form is enhanced.
  • Added more options for volume control. Both the volume buttons and the volume slider can now be enabled at the same time. There are also options to show 4 volume buttons with 1 dB and 4 dB step sizes.
  • APM updated to v96 to solve a problem noticed on newer Auro disks.
  • Corrected an issue in which the Dirac filter failed to load on startup.
  • If a failure to fetch new updates has occurred, an nslookup to the server will be performed for diagnostic purposes.
  • The User Guide reached form the help pages is updated to describe some of these changes. See the “Revision History”.
V1.3.2

February 24, 2020

  • The maximum amplifier sensitivity is now limited to 4V to match the hardware capability.
  • Clarify the use of the feedback form by suggesting contact with customer support:
  • The ‘info’ icon on the Home page changes to yellow and a statement appears on the Detailed Status page if the development team has sent you a message in response to your feedback suggestions. However, please note that this channel is intended for the development team to clarify any of your improvement suggestions. It is not a replacement for the technical support channels provided above.
    For the fastest technical support response please use one of the channels provided above.

The following bugs have been tested and found to have been fixed by the developers:

  • 541: Static IP assignment not working. The procedure to select a static IP address was broken in v1.2. It is restored here.
  • 557: Dirac trim sliders not consistent or remembered. When adjusting the channel trims in the Dirac Live tool, the trim settings were not remembered and applied for the calibration. This is corrected.
  • 355: Limit precision of displayed Dirac trim. The UI is updated to show the correct amount of precision.
  • 561: Subwoofer redirect level doesn’t scale with sub number. Now the redirected signal is scaled just like the LFE signal when the number of subs changes.
  • 560: PEQ parser doesn’t accept decimal point frequency. In previous versions, specifying a non-integer frequency to PEQ would result in a bad filter setup.
  • 463: Blasting volume slider. When the volume slider was selected it was possible to get the volume “stuck” at full volume. The volume slider is reworked and this no longer happens. (new volume config?)
  • 553: Update the master volume when the amp sense is changed. In previous versions, changing the amplifier sensitivity did not immediately change the output volume. Now it does.
  • DTS:X to DTS 192k transition: Playing a DTS:X stream and switching to a DTS-MA 192k stream with the sample rate converter engaged (Dirac or upmix) would not play correctly. Fixed.
  • Do not turn off bass management on exiting Dirac early: Previously exiting the Dirac Live tool before completing the calibration would turn off the bass manager.
  • User Guide updates. Download version 1.3 from the help page and see the Revision History for what has changed.
  • IR remote code over HTTP support has been added. See below.
  • The ‘Speaker Map’ link on the ‘System Configuration/SPEAKERS’ page links to a picture of the back panel overlaid with the speaker mappings. This shows the correct XLR connectors for the particular channels if they were enabled. If the speaker is not enabled, no sound will be produced.
IR Remote Code Feature:

The URL is http://192.168.1.100/ircmd?code=XXXX where XXXX is the ‘NEC Code’ from the ‘IR Code Table’ in the User Guide. You should replace 192.168.1.100 with the actual IP address of your unit. More than one NEC Code may be sent by separating them with comma. Note that the code must be sent exactly as described in the User Guide: 4 hexidecimal digits, lower case, and without 0x prefix. The following example uses the ‘wget’ and the ‘curl’ command:

Revision history

VersionDateComment
1.0.012/20/2019Initial production build.
1.1.01/13/2020Connectivity improvements.
1.2.01/30/2020Volume, EDID and PEQ changes.
1.3.12/13/2020Dirac trim, 4v output, subwoofer level.
1.4.03/10/20205 subs, faster volume.
1.4.34/7/2020Reduce pops, support third party apps.
1.5.04/22/2020Updated Linux kernel to support clean audio by Roon and BlueTooth…
1.5.15/7/2020A small number of updates to the video system.
1.6.06/10/2020beta test of signal generator.
1.7.08/5/2020Dirac Live Bass Control, Dirac bypass, Roon update.
1.7.18/13/2020Minor Dirac Live Bass Control issues clean up


Issue Tracker
A list of known open issues with the HTP-1 will be tracked here. Only issues confirmed by multiple users or issues acknowledged by Monoprice will be listed.
  1. None reported as of version 1.8.5 (2021-01-28)
Upcoming Promised Features
  • DTS:X Pro
  • HDMI 2.1
Owner Wishlist of Features (in no particular order)
  • Roon Multi-channel
  • Upmixer memory based on both input and codec
  • Individual speaker mute function
  • Trigger on/off selection for each trigger output
  • Loudness curve frequency adjustment/change curve to match ISO226:2003
  • Function/command to reset all PEQ values
  • PEQ settings export/import
  • Input level adjustment
  • Input delay adjustment
  • Change tone control bass corner to 40Hz and treble to 8Khz
  • Roomie remote compatibility
  • Take high pass filters down to 15-20hz.
Note that some of these functions can be achieved with the Preset Recorder below.

Third Party Apps

HTP-1 Custom Web UI
by @pink soda

An unofficial web interface to control the Monoprice Monolith HTP-1 written in Vue 3. The goal is a fast, customizable, and mobile-friendly interface. Thanks to TimoJ and markus767 for providing feedback.

Access: HTP-1 Custom Web UI

beqdesigner by @3ll3d00d

The latest version of beqdesigner should now allow BEQ (see: Bass EQ for Filtered Movies) to work with the HTP-1. It can also serve as a general purpose PEQ editor, which can be easier to use than the web config.

Download: Releases · 3ll3d00d/beqdesigner (choose beta 0.9.3-beta.17 or newer)

Documentation: Manage HTP-1 Filters - BEQDesigner


Preset Recorder by @audioworker and @pink soda

Note that the HTP-1 Custom Web UI above also includes the same Preset Recorder functionality. The original preset recorder is still available below:

Record and edit sequences of commands that are sent by the 8 preset buttons on the remote.

Download: The "Official" Monoprice Monolith HTP-1 Owners...

Documentation:

Some of the power users here put together a preset recorder/editor for HTP-1. Here it is for all of you. For those who code HTML, it's really simple.

To use: Download the attached text file and rename it with a .html extension. Then load it into your browser, and enter the IP address of your HTP-1. It lets you record and edit sequences of commands that are sent by the 8 preset buttons on the remote.

No warranty is implied or granted.
I hope everyone notices how powerful this tool actually is.

It allows to do 8 remote control presets (A-D and 1-4 keys) with any of the webui's commands. For example you can enable/disable speakers, change levels, enable certain Dirac preset, adjust EQ, select upmixer etc. all with one quick remote preset (I know you can do remote macros for example with Harmony, but this is on a different level). And since those are mapped to remote keys, you can also enable those with http-commands from your home automation software.
[/quote]
 

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Discussion Starter · #3 · (Edited)
FAQs and Tips
Requirements for Dirac Live Calibration

A laptop or desktop personal computer, along with a calibrated microphone (not included), are required to perform a Dirac calibration of the HTP-1. A smartphone cannot be used to perform a Dirac calibration.

Currently, Dirac calibration requires a PC or Mac Laptop running Dirac Live with an external mic attached to the laptop. Dirac recommends using the MiniDSP UMIK-1.


Choosing a Calibration Mic
The Dayton UMM-6 are on sale for $65 (before coupon) at Parts Express through 12/31/19. The UMM-6 is essentially the same as the UMIK-1 with a downloadable individual calibration file (20Hz - 20kHz). Unless you need calibration below 20Hz, a CSL calibrated mic is not necessary.

https://www.parts-express.com/dayton-audio-umm-6-usb-measurement-microphone--390-808

A UMIK-1 direct from miniDSP is $97 shipped to US

A CSL calibrated UMIK-1 is $105 - Cross·Spectrum - Calibrated MiniDSP UMIK-1 Microphones for Sale
CSL calibrated UMM-6 $105 - Cross·Spectrum - Calibrated Dayton Audio UMM-6 Microphones for Sale

The Dayton IMM-6 for mobile device is also on sale for $14.50. Some may want to pick one up for RTA/SPL use. Dirac Live has a mobile app for iOS and Android but only NAD devices are supported at this time.

https://www.parts-express.com/Search.aspx?keyword=imm-6&sitesearch=true

Tips for Ensuring a Successful Dirac Calibration
See The official Dirac Live thread for additional resources.

Quick Start Guide from Dirac: https://live.dirac.com/content/uploads/2019/05/dirac-live-quick-start-print-version.pdf

While Dirac is generally not too sensitive to small differences between calibrations, it is very important to make sure all of Dirac's calibration guidelines are followed as closely as possible to get the best result. Here's a summary of those I feel are most important to ensure a proper calibration:

  • Take the first measurement in the desired sweet spot position, which should be equidistant to and exactly between the front left and front right speakers, even if there is no seat exactly between these two speakers. After performing the calibration, this can be verified by checking the Dirac Calibration Delay (ms) values for the front left and front right speakers in the Calibration tab of the HTP-1 configuration, which should be equal to or very close to each other.
  • For the first measurement only, the mic should be at ear height when sitting down in the main seat. For the UMIK-1, the mic should be pointing straight up, the tip of the mic should be at ear level, and the 90 degree calibration file should be used.
  • While taking a single measurement for the Dirac calibration can be useful for testing purposes, it will not give Dirac enough information to produce a calibration result that sounds good (it may sound dry and dull). The more data Dirac is given, the better the results end up being.
  • All measurement types involve mic positions at three different heights -- ear level, above ear level, and below ear level. All above ear level positions and below ear level positions should be several inches above or below the ear level position. For example, my ear height when sitting down at the main seat is 41 inches. So when doing a couch calibration, I take the first measurement in the sweet spot with the mic tip 41 inches high, the next 8 measurements with the mic tip at around 49 inches high, and the remaining 8 measurements with the mic tip around 33 inches high. While it's not necessary to be this precise with mic heights besides the first position, it helps me to have a quick and simple process to follow with every calibration.
  • No two mic positions should be too close to each other (specifically, Dirac recommends a distance of 40-60cm between measurement points), and no mic positions should be reused to take multiple measurements in the same position.
  • No mic positions should be too close to any reflective boundary (~1ft) if possible. If seat backs are very close to any mic position, it can help to fully recline all seats while performing the calibration. This made a big difference on my particular setup and I always recline my seats when performing Dirac calibrations now.
  • For every mic position, the mic tip should have an unobstructed line of sight to every speaker (besides subwoofers) if possible. Reclining my seats helped me achieve this with some of my rear speakers.
Additional comments from @AustinJerry :

  • First, it is extremely important to establish the proper levels for all speakers, including the sub channel, at the beginning of the Dirac calibration. The final speaker output levels are closely influenced by which speaker has the lowest level at the beginning of the calibration. If any speaker, or speaker group, has a level that is too low, all final output levels will be low, requiring a higher master volume setting to reach normal listening levels, which can be frustrating.
  • Finally, while it is essential that enough measuring points be used, and that as long as the guidelines mentioned above are followed, I have found that Dirac results are highly repeatable. I remember from my days in the Audyssey support threads, users would be obsessed with experimenting with different mic measurement patterns, claiming that the “magic” placement would result in significantly better results. I have not found this to be the case. Over the many calibrations I have performed following good practices, the results have always been consistent, and consistently good, measured by REW and by my listening tests.


External Pink Noise Test Tones
Thanks @TimoJ for the following download links:



List of Suitable XLR to RCA Cables/Adapters
Note that this list is for connecting XLR to RCA, which is only required when connecting to amplifiers that do not have XLR inputs. For amps that do, any XLR male to female connectors will work.
The correct xlr to rca cables will have pin 1 of the xlr wired to the outer contact of the RCA, pin 2 wired to the center contact, and pin 3 should be floating.

Image source: http://www.rane.com/pdf/ranenotes/Sound_System_Interconnection.pdf

List of adapters/cables will be added as they are tested and confirmed to work.

Troubleshooting any issues with the HTP-1
If the HTP-1 is having any sort of issues at all, see if any of the following resolve the issue:

  1. Change input and change back. This usually resolves issues if a source is playing static noise.
  2. Power cycle, with Fast Boot mode enabled. This resets the DSP and can resolve issues related to the DSP.
  3. Power cycle, by flipping the power switch on the back of the unit and leaving it off for a minute. This can resolve issues such as Dirac not being able to find the HTP-1 on the network.


Owner Impressions/Reviews

 

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FAQs and Tips
Requirements for Dirac Live Calibration
A laptop or desktop personal computer, along with a calibrated microphone (not included), are required to perform a Dirac calibration of the HTP-1. A smartphone cannot be used to perform a Dirac calibration.

Currently, Dirac calibration requires a PC or Mac Laptop running Dirac Live with an external mic attached to the laptop. Dirac recommends using the MiniDSP UMIK-1 (https://www.minidsp.com/products/acoustic-measurement/umik-1 or http://cross-spectrum.com/measurement/calibrated_umik.html).

The calibrated mics from Cross Spectrum Labs are slightly more accurate than the factory calibration from miniDSP, but the factory calibrations are usually quite good already. Some have reported audible improvements using a CSL mic; others have reported that the differences were negligible for them. It can also depend on the mic itself.
Is there away to use PRO level microphones like earthworks M30?
 

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Yes pink soda this is a great start. Thank you!
@MonolithGuy thanks in advance for keeping tabs on this thread and maintaining the open communication you provided in the announcement thread.

Sent from my Pixel 3 XL using Tapatalk
 

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http://cross-spectrum.com/measurement/calibrated_umik.html

Currently, Dirac calibration requires a PC or Mac Laptop running Dirac Live with an external mic attached to the laptop. Dirac recommends using the MiniDSP UMIK-1 (https://www.minidsp.com/products/acoustic-measurement/umik-1 or http://cross-spectrum.com/measurement/calibrated_umik.html).

The calibrated mics from Cross Spectrum Labs are slightly more accurate than the factory calibration from miniDSP, but the factory calibrations are usually quite good already. Some have reported audible improvements using a CSL mic; others have reported that the differences were negligible for them. It can also depend on the mic itself.
The Dayton UMM-6 are on sale for $65 (before coupon) at Parts Express through 12/31/19. The UMM-6 is essentially the same as the UMIK-1 with a downloadable individual calibration file (20Hz - 20kHz). Unless you need calibration below 20Hz, a CSL calibrated mic is not necessary.

https://www.parts-express.com/dayton-audio-umm-6-usb-measurement-microphone--390-808

A UMIK-1 direct from miniDSP is $97 shipped to US

A CSL calibrated UMIK-1 is $105 - http://cross-spectrum.com/measurement/calibrated_umik.html
CSL calibrated UMM-6 $105 - http://cross-spectrum.com/measurement/calibrated_umm6.html

The Dayton IMM-6 for mobile device is also on sale for $14.50. Some may want to pick one up for RTA/SPL use. Dirac Live has a mobile app for iOS and Android but only NAD devices are supported at this time.

https://www.parts-express.com/Search.aspx?keyword=imm-6&sitesearch=true
 

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Discussion Starter · #10 ·
The Dayton UMM-6 are on sale for $65 (before coupon) at Parts Express through 12/31/19. The UMM-6 is essentially the same as the UMIK-1 with a downloadable individual calibration file (20Hz - 20kHz). Unless you need calibration below 20Hz, a CSL calibrated mic is not necessary.

https://www.parts-express.com/dayton-audio-umm-6-usb-measurement-microphone--390-808

A UMIK-1 direct from miniDSP is $97 shipped to US

A CSL calibrated UMIK-1 is $105 - http://cross-spectrum.com/measurement/calibrated_umik.html
CSL calibrated UMM-6 $105 - http://cross-spectrum.com/measurement/calibrated_umm6.html

The Dayton IMM-6 for mobile device is also on sale for $14.50. Some may want to pick one up for RTA/SPL use. Dirac Live has a mobile app for iOS and Android but only NAD devices are supported at this time.

https://www.parts-express.com/Search.aspx?keyword=imm-6&sitesearch=true

Great summary, adding this info to the FAQ in the first post if you don't mind.
 

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The Dayton UMM-6 are on sale for $65 (before coupon) at Parts Express through 12/31/19. The UMM-6 is essentially the same as the UMIK-1 with a downloadable individual calibration file (20Hz - 20kHz). Unless you need calibration below 20Hz, a CSL calibrated mic is not necessary.

https://www.parts-express.com/dayton-audio-umm-6-usb-measurement-microphone--390-808

A UMIK-1 direct from miniDSP is $97 shipped to US

A CSL calibrated UMIK-1 is $105 - http://cross-spectrum.com/measurement/calibrated_umik.html
CSL calibrated UMM-6 $105 - http://cross-spectrum.com/measurement/calibrated_umm6.html

The Dayton IMM-6 for mobile device is also on sale for $14.50. Some may want to pick one up for RTA/SPL use. Dirac Live has a mobile app for iOS and Android but only NAD devices are supported at this time.

https://www.parts-express.com/Search.aspx?keyword=imm-6&sitesearch=true
The UMIK-1 mic sold by miniDSP comes with calibration file down to 10Hz and up to 20000KHz. The one calibrated and sold by CSL goes down to 5Hz (mine down to 4.33Hz actually) and up to 25000KHz. The big advantage of the UMIK-1 mic sold and calibrated by CSL is that each calibration (0 degrees, 45 degrees and 90 degrees) is actually taken. However, the UMIK-1 sold by miniDSP is calibrated only Standard (0 degrees) and the 90 degrees data is extrapolated or "automatically generated" from the 0 degrees calibration data.
 

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The Dayton IMM-6 for mobile device is also on sale for $14.50. Some may want to pick one up for RTA/SPL use. Dirac Live has a mobile app for iOS and Android but only NAD devices are supported at this time.



https://www.parts-express.com/Search.aspx?keyword=imm-6&sitesearch=true
Can you explain why the UMIK is not capable of measuring SPL? I used to use my Radio Shack Analog SPL meter to equalize my channels with pink noise and map my frequency response.

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Can you explain why the UMIK is not capable of measuring SPL? I used to use my Radio Shack Analog SPL meter to equalize my channels with pink noise and map my frequency response.

Sent from my Pixel 3 XL using Tapatalk
I think you are miss reading Marc's recommendation as the UMIK-1 is more than capable of measuring SPLs. In fact, it's the one I use for serious SPL reading and gain match my subwoofers. I think what Marc is saying is that for $14.50 you can have a very good mic for SPL reading if you don't have a UMIK-1 already or want something more compact so you don't need to take your laptop, USB cable and UMIK-1 mic out. Just plug the Dayton IMM-6 into your iOS or Android device and you are done ;)
 
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I think what Marc is saying is that for $14.50 you can have a very good mic for SPL reading if you don't have a UMIK-1 already or want something more compact so you don't need to take your laptop, USB cable and UMIK-1 mic out. Just plug the Dayton IMM-6 into your iOS or Android device and you are done ;)
Yes

The UMIK-1 mic sold by miniDSP comes with calibration file down to 10Hz and up to 20000KHz.
I'm 99% sure the miniDSP and Dayton provided calibrations are only down to 20Hz.
 

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Discussion Starter · #15 ·
Yes


I'm 99% sure the miniDSP and Dayton provided calibrations are only down to 20Hz.
Just double checked two of my UMIK-1 calibration files from miniDSP and they do go down to 10hz. Can't speak for the Dayton.
 

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Just double checked two of my UMIK-1 calibration files from miniDSP and they do go down to 10hz. Can't speak for the Dayton.
Excellent!

My UMIK-1 is from CSL. I'll compare it to the miniDSP CAL file. Purchasing from CSL is preferred but probably unnecessary (CSL has a history of going out of stock for long periods… perhaps they have resolved this?). Absolutely precision is not necessary for REQ in the bass region.

I just noticed that PE stocks the UMIK-1 now. PE is always offering promotional discounts and free shipping.
https://www.parts-express.com/minid...sb-measurement-calibrated-microphone--230-332
 

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Discussion Starter · #17 · (Edited)
Excellent!

My UMIK-1 is from CSL. I'll compare it to the miniDSP CAL file. Purchasing from CSL is preferred but probably unnecessary (CSL has a history of going out of stock for long periods… perhaps they have resolved this?). Absolutely precision is not necessary for REQ in the bass region.

I just noticed that PE stocks the UMIK-1 now. PE is always offering promotional discounts and free shipping.
https://www.parts-express.com/minid...sb-measurement-calibrated-microphone--230-332
Here's a plot of my CSL cal file vs factory miniDSP cal at 90 degrees. Take note of the y-axis scale, which makes the differences easier to see, but also exaggerates them if you don't realize how much zoom there is.

While the miniDSP does go down to 10 Hz, it's off by 2 dB by that point. From 20 Hz to around 6 kHz, miniDSP is off by up to only 0.5 dB which should be negligible. After 6 kHz, the error is mostly around 1 dB which I do feel can be slightly audible for those sensitive to higher frequencies. Of course, this is just for my particular mic; others may have greater or smaller differences. For me personally this difference justifies the small premium of the CSL mic (considering the cost relative to the processor we're talking about), but I think it's fair if anyone considers these differences minor enough to not worry about.
 

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Can anyone comment yet on CEC & ARC stability?
How about general HDMI stability?
Mine is on the way but this is my single biggest concern.
 
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