PICO 8 audio speed

[WoWin]

Anyone else noticed that audio is much too fast using the pico8 fantasy console on the CSO. It seems to be related to usb audio.

Is there a way to fix this? I guess it is more of a pico8 bug, but maybe there is a workaround?

[kite]

I haven't looked at this yet, I haven't bought/used PICO8 but it's on my list if anyone does work it out they can add the steps to the wiki: https://github.com/kiteretro/Circuit-Sw ... for-PICO-8

[WoWin]

After hours of tinkering I got it to work. Aparently pico8 tries to play in a lower sampling rate (16k?) which is not supported by the USB sound card (only 44100 and 48k). Fortunately, alsa allows software conversion of sampling rate. I change my default audo device to one which does conversion in /etc/asound.conf:

Code: Select all

pcm.card {
  type hw card 1
}
pcm.!default {
          type plug;
          slave {
                pcm card;
                rate 48000;
          }
 }
ctl.!default {
  type hw card 1
  }
  

Warning: While it fixes audio for pico8 I didn't thoroughly test if this has other adverse effects. Since it is a software conversion it might also impact performance. If anyone knows how to achieve the same in a less hackish way I would more than happy to hear about it (e.g. changing the audio device on the fly only for pico 8 would be cool, using no software conversion for the other stuff).

For adding pico8 to emulationstation I followed this guide:https://www.lexaloffle.com/bbs/?tid=3935

I use the following script to start it (stretches to the full screen, but is a bit blurry): ~/pico-8/+StartPICO-8.sh

Code: Select all

#!/bin/bash
pushd "/home/pi/pico-8"
./pico8 -width 256 -height 256  -pixel_perfect 0 -splore
popd

I hope others find this information helpful. Kite, please feel free to add the information to the wiki.

[kite]

Awesome nice work! I'll have to buy it and try myself and see what effects there are on everything else (just in case)

[WoWin]

BTW, I just wanted to put this excellent guide here for adding PICO 8 to emulationstation: https://www.lexaloffle.com/bbs/?tid=3935

It now also covers my audio fix.

[kite]

Fantastic, i've put links in for now

[WoWin]

Did something change with the way sound is done with raspbian stretch (or the latest circuit-sword image)? For some reason the fix above doesn't work anymore and breaks sound everywhere.