Clock rate drops when connecting external sound card

VCV Rack
1

Yesterday I was playing around with VCV and connecting it to my 2600 which I recently finished some repairs and mods on. The idea was to send sequencer data (I was using Foundry and clocked with Clocked) thru CV-Midi and out the CV ports on my Beatstep Pro. Worked great!

So I figured lets bring the audio in from the 2600, process it a bit and send it back out to my M-Audio Profire 2626 - which has been working fine for a long time. I installed the Audio-8 module, selected ASIO and as soon as I selected the M-Audio firewire device, the clock seemed to cut to almost half speed. The numbers still showed 120 but you could see the sequence step indicators slow significantly. I select ‘None’ for the audio device and the speed immediately returned to normal. I tried Sequence-3 and JW Simple clock - same behavior.

So thinking it might be OS or soundcard related (this machine is windows 8.1/64) I went to my other machine - which is a Windows 7/64 system with an M-audio FW1814. The same sort of behavior happened again.

Running the latest VCV Rack 1.1.6 Audio rate is 44.1khz Tried adjusting thread count from 4 to 1 - no change. Tried changing frame rate - again no change.

Any ideas as to what else might cause this?

Dave

2

Hi. This is normal behavior in Rack v1. Only if an audio driver and a device is selected Rack runs on proper timing. So, Rack runs actually to fast if no device is selected and at the correct speed if selected. Hope this helps.

3

Alrighty then. If that’s the way it’s supposed to work, great! I was a bit concerned seeing the drop in rate…it looks to be ~ 60bpm, not 120, when connected. That’s ok though.

Thanks for the response!

Dave

4

In Rack v2, the engine will not advance at all when a “primary module” is not in your rack (e.g. VCV Audio, VCV Recorder). The rack will be suspended in time.

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