https://audio.rightmark.org/products/rmaa.shtml
its a SW version of the AudioPrecision HW version.
works in Wine or PlayOnLinux, PlayOnMac.
but... PlayOn needs manual Manage install, automatic scripts are Down.
2. Generate the Test Waveforms 48Khz.
3. Make a video, with the Test Waveforms.
Davinci Resolve is preferable in Linux.
& Upload to LBRY.
4. Connect the Output of the LBRY SW via Virtual Audio Cable to RMAA.
this part is tricky...
Option A) can be done using 2 computers, 2 sound interfaces,
Digital Only S/pdif or optical Toslink or optical ADAT, or AES/EBU.
RME hdsp 9632 is better for Alsa, Free Drv..
USB Focusrite 18i20 mk2 or Clarett 8pre can work but needs Windows or Mac to configure the DSP i/o.
etc...
Play Computer Master Clock
Recording Computer Slave to External Clock.
Very Easy:
1. Download
https://audio.rightmark.org/products/rmaa.shtml its a SW version of the AudioPrecision HW version. works in Wine or PlayOnLinux, PlayOnMac. but... PlayOn needs manual Manage install, automatic scripts are Down.
2. Generate the Test Waveforms 48Khz.
3. Make a video, with the Test Waveforms.
Davinci Resolve is preferable in Linux. & Upload to LBRY.
4. Connect the Output of the LBRY SW via Virtual Audio Cable to RMAA.
this part is tricky... Option A) can be done using 2 computers, 2 sound interfaces, Digital Only S/pdif or optical Toslink or optical ADAT, or AES/EBU.
Lynx AES16 has AES/EBU Double Wire preferable "Left = 1x AES /EBU, Right 2x AES/EBU" Standard AES/EBU is the same as S/PDIF 1 cable 2 signals but with Balanced/Diferential and Higher Voltage. Lynx AES16 requires a paid drv. for Linux. OSS Not Alsa. http://manuals.opensound.com/devlists/Linux.html http://manuals.opensound.com/devlists/lynxtwo.html http://www.opensound.com/oss.html https://en.wikipedia.org/wiki/Open_Sound_System
RME hdsp 9632 is better for Alsa, Free Drv.. USB Focusrite 18i20 mk2 or Clarett 8pre can work but needs Windows or Mac to configure the DSP i/o. etc... Play Computer Master Clock Recording Computer Slave to External Clock.
Option B) use a Loopback Virtual Cable, QJackCtl, jackd2 in Linux. jackOSX https://jackaudio.org/downloads/ https://github.com/jackaudio/jack2-releases/releases but... LBRY does Not have Jackd2 support? https://vb-audio.com/Cable/ https://rogueamoeba.com/freebies/soundflower/ https://vac.muzychenko.net/en/ https://github.com/mattingalls/Soundflower/releases https://rogueamoeba.com/loopback/buy.php
Option C) Use a Network Audio driver + RJ45 CAT5a or better, or Optical Lc-Lc similar to Dante or Ravena... https://my.audinate.com/support/downloads/dante-virtual-soundcard https://nerds.de/en/loopbeaudio.html https://www.merging.com/products/alsa_ravenna_aes67_driver https://www.merging.com/products/aes67_vad_standard
5. Analyze the Playback Recorded Loopback Audio in RMAA.
P.D. Using Analog Loopback Audio introduces more variables, Not Recommended for this test.