Recent content by phofman

But that's not related to some differential mode, but simply averaging the vector distortions of the two channels (each a bit different) improves the resultant distortion, statistically.

It's always perfect cosine to the fundamental sine, IMO just a different phase shift between the channels as that simple equation yields.

IIUC the subtraction can suppress only common-mode artefacts in both channels which is not harmonic distortion.

Maybe it's like this: sin(x) - sin(x-0.001) = 5.×10^-7 sin(x) + 0.001 cos(x) IIUC that 1mV subtracted signal is cos(x), i.e. phase shifted by pi/2. The channels are slightly phase shifted against each other at that frequency - to be expected for real-world HW, they cannot have identical...

Quite a few people use REW on linux with no major issues. Me - Mint Mate, Xorg. Since REW is plain java - do java GUI apps run OK on your installation? Do you have a reasonable set of fonts installed? Perhaps Wayland vs. Xorg?...

IMO much easier (and technically viable) is to precisely fine-tune the gain in the digital domain. It's very unlikely a HW would surpass the precision the digital gain offers. IMO ADCiso has no advantage in precise gain alignment - it has input amplifiers just like any other ADC. 10-turn pots -...

I played with the virtual symmetrical mode not in REW, but directly in linux audio chain https://www.diyaudio.com/community/threads/virtual-balanced-in-out-from-regular-soundcard-in-linux-results.326747/ (the principle is identical). The results were good, but it required calibrating the...

Perhaps your AVR's AUX1 input uses different DSP setting than AUX2?

Perhaps https://forums.steinberg.net/t/windows-11-update-23h2-just-installed-has-crashed-the-asio-driver/971904/11 ?

IME the requirement for a GUI software on a headless server is quite common. E.g. I needed to convert LyX files to PDF automatically on a headless server. I have always used Xvnc (part of TightVNC, debian package tightvncserver) with good results. If access to the GUI is actually needed, any...

The exclusive mode bypasses any volume control done by windows mixer. If its ouput has lower level than non-excl mode, then the windows mixer boosts the signal. It may do other things, depending on your DSP chain in the mixer.

Exclusive WASAPI goes directly to your soundcard, while shared WASAPI goes through the windows audio mixer with all its features and DSP, whatever is configured. Including volume control.

UAC2 is a protocol used by almost all modern USB audio devices which offer high resolution. The actual driver is the key. I do not know what driver miniDSP devices use - whether some Thesycon build, or their own make. They are large enough to afford their own driver.

The issue I was talking about was handled in linux - setting the cpufreq governor to "performance" (i.e. running at fixed maximum frequency), and setting the max frequency to something small. No idea if windows allow that. If yes, then likely in the Power Plan configuration.

Sync or async is unlikely to make any difference, async means the driver justs adjusts the number of samples per USB packet, based on feedback sent by the device. In fact async is slightly more work for the driver. But the actual driver for Tascam & Focusrite could be the culprit, or with some...