Search found 59 matches

by robiwan
Mon Jan 01, 2018 6:41 pm
Forum: Octo Sound Card for the Pi
Topic: Furture of Octo?
Replies: 5
Views: 2832

Re: Furture of Octo?

A small tip for next revision of OC, instead of 24 pin headers, use 26 pin ones, because of the large availability of premounted 26 pin cables :)
by robiwan
Mon Dec 25, 2017 5:43 pm
Forum: Stereo soundcard for the Raspberry Pi
Topic: Lowest possible latency
Replies: 42
Views: 20453

Re: Lowest possible latency

It might indeed be relevant. Thanks for the info!
by robiwan
Thu Dec 14, 2017 7:02 pm
Forum: Octo Sound Card for the Pi
Topic: Reduce volume level
Replies: 5
Views: 1403

Re: Reduce volume level

There is an output mute pin ... I wonder if your amplifier has a mute input ? If so, perhaps there is a way to send the correct mute signal to the amp ? It would perhaps be interesting to make a special breakout board that has relays (or two CD4066s) to short output to ground during mute ? Relays a...
by robiwan
Sat Dec 09, 2017 3:34 pm
Forum: Stereo soundcard for the Raspberry Pi
Topic: Real-Time Digital Signal Processing
Replies: 3
Views: 1704

Re: Real-Time Digital Signal Processing

I've put up screenshots of alsamixer settings for the card in this thread: http://forum.audioinjector.net/viewtopic.php?f=5&t=3068
by robiwan
Fri Dec 08, 2017 5:56 pm
Forum: Octo Sound Card for the Pi
Topic: Unstable behavior and high CPU ?
Replies: 5
Views: 2120

Re: Unstable behavior and high CPU ?

I wonder if the cpu usage is to do with the plugin - I assume you have the .asoundrc and are using the default plugin. What happens if you use vlc with hw:0 and 8 channels ? I can also try play an 8 channel sine wave with aplay, should be comparable. When I use alsaloop, the CPU usage is grotesque,...
by robiwan
Wed Dec 06, 2017 12:26 am
Forum: Octo Sound Card for the Pi
Topic: Unstable behavior and high CPU ?
Replies: 5
Views: 2120

Re: Unstable behavior and high CPU ?

Sorry, I meant I use Raspbian Stretch. Was that what you meant ?
by robiwan
Tue Dec 05, 2017 2:36 am
Forum: Stereo soundcard for the Raspberry Pi
Topic: Low input sensitivity
Replies: 13
Views: 6121

Re: Low input sensitivity

They are for left and right respectively, that's why both need to be shorted.
by robiwan
Mon Dec 04, 2017 4:43 pm
Forum: Octo Sound Card for the Pi
Topic: Unstable behavior and high CPU ?
Replies: 5
Views: 2120

Re: Unstable behavior and high CPU ?

Oh, I should add that I run it on an RPi3 with Debian Stretch Lite.
by robiwan
Sun Dec 03, 2017 6:25 pm
Forum: Stereo soundcard for the Raspberry Pi
Topic: Real-Time Digital Signal Processing
Replies: 3
Views: 1704

Re: Real-Time Digital Signal Processing

What application are you using to pipe audio from input to output ? I use this and it works nicely:

>alsaloop -c 2 -r 48000 -C plughw:0 -P plughw:0