Search found 3 matches

by barney39
Fri Sep 29, 2017 7:41 pm
Forum: Stereo soundcard for the Raspberry Pi
Topic: Synchronization of IO
Replies: 3
Views: 1655

Re: Synchronization of IO

Hi Matt, Thanks so much for your advice. I hadn't found the snd_pcm_link functionality in the ALSA docs. It sounds like exactly what I need. However, calling snd_pcm_link returns an error code of -22 (Invalid argument) . I am attempting to link the playback/capture pcm devices after opening them bot...
by barney39
Sat Sep 23, 2017 1:22 am
Forum: Stereo soundcard for the Raspberry Pi
Topic: Synchronization of IO
Replies: 3
Views: 1655

Synchronization of IO

Hi there, We are doing some very high precision timing where we need to align the recorded input samples to the played output samples (we are not worried about latency or delays in starting the recording playback)- at the moment it seems that every time we start up the audio, the alignment in time b...
by barney39
Fri Sep 15, 2017 11:09 pm
Forum: Stereo soundcard for the Raspberry Pi
Topic: Cannot get RCA microphone to work
Replies: 3
Views: 2037

Re: Cannot get RCA microphone to work

Hi, We have same question issue as artur.noole - we have tried connecting a microphone from an old headset to the line input (simply cut-off jack and soldered on a phono plug with no success. I am guessing that we need some form of powered/amplified microphone to connect. What model /type would you ...