Garbled output when run standalone

[davex25]

Not using rpi, just standalone on a desktop.

Steps:

built tag v1.3.0 (64e554) successfully with cmake
run jack via cadence, 44.1khz, buffer size 256 samples, 2 periods/buffer (tried varying these settings also)
guitar plugged into USB audio device
connect standalone to system ins and outs using carla

Sounds like maybe periodic buffer underruns, where period gets longer with a larger buffer size.

[GuitarML]

If you built with cmake using the readme steps I don't think this is the problem, but verify that you built in Release mode and not Debug. I don't have much experience using jack, what audio interface/OS/hardware are you running on? Seems like it might not be able to keep up with processing on your system, at least with standalone. Might want to try running the plugin through a DAW to see if that helps.

[davex25]

I built according to your instructions for CMake, so should be release mode.

I also tried running the VST3 plugin. In Renoise, it ran max CPU for a few seconds before it was disabled by the host. Also tried in Carla. No audible output, Carla reports about 4 buffer underruns per second at 44.1 KHZ, buffer size of 2048. One CPU maxxes out on system monitor while the VST is active.

One more thing I haven't tried is running the LV2 plugin. I'll report back if I discover anything there. (edit: Tried this, same behavior)

I've tried with a couple USB devices -- Behringer U-PHORIA UM2, and an older Yamaha Audiogram 6. Similar results with both.

Uname -r shows "5.15.4-1-ck". From lscpu -- "Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz"

Happy to do some further digging if you feel like pointing me in the right direction.