On Wed, Apr 28, 2021 at 11:48:33AM +0000, Rodolfo Medina wrote: > didier gaumet <didier.gau...@gmail.com> writes: > > > Le 28/04/2021 à 09:37, Rodolfo Medina a écrit : > > [...] > >> First of all, problem 1): same error now with a 2-channel and a 3-channel > >> file: > > [...] > >> ERROR: Connecting chainsetup failed: "Enabling chainsetup: AUDIOIO-ALSA: > >> ... Channel count 2 is out of range!" > > [...] > > > > http://nosignal.fi/ecasound/Documentation/examples.html#multichannel > > > > I do not use ecasound but it seems to me that this indicates that by default > > ecasound is in a one channel (mono, channel #1) mode and that channels have > > to be specified with -a, perhaps like this: > > > > $ ecasound -a:1,2,3 -i:sndfile,3canali.wav -o alsahw,2,0 > > or perhaps > > $ ecasound -a:all -i:sndfile,3canali.wav -o alsahw,2,0 > > > Thanks, Didier: > > it seems to work with 2 channels: > > $ ecasound -a:1,2 -i:sndfile,2canali.wav -o alsahw,2,0 > ************************************************************************** > * ecasound v2.9.1 (C) 1997-2014 Kai Vehmanen and others > ************************************************************************** > (eca-chainsetup) Chainsetup "untitled-chainsetup" > (eca-chainsetup) NOTE: Real-time configuration, but insufficient privileges > ... to utilize real-time scheduling (SCHED_FIFO). With small buffersizes, > ... this may cause audible glitches during processing. > (eca-chainsetup) "rt" buffering mode selected. > (audioio_sndfile) Using libsndfile to open file "2canali.wav" for reading. > (eca-chainsetup) NOTE: using existing audio parameters -f:s16_le,2,48000 > ... for object 'sndfile' (tried to open with -f:s16_le,2,44100). > (eca-chainsetup) Opened input "sndfile", mode "read". Format: s16_le, > ... channels 2, srate 48000, interleaved (locked params). > (eca-chainsetup) Opened output "alsahw", mode "write". Format: s16_le, > ... channels 2, srate 48000, interleaved. > - [ Connected chainsetup: "untitled-chainsetup" ] ------------------------ > - [ Controller/Starting batch processing ] ------------------------------- > - [ Engine - Driver start ] ---------------------------------------------- > > - [ Engine - Processing finished ] --------------------------------------- > - [ Controller/Batch processing finished (0) ] --------------------------- > - [ Controller/Processing stopped (cond) ] ------------------------------- > - [ Engine exiting ] ----------------------------------------------------- > (eca-control-objects) Disconnecting chainsetup: "untitled-chainsetup". > > > but not with 3: > > $ ecasound -a:1,2,3 -i:sndfile,3canali.wav -o alsahw,2,0 > ************************************************************************** > * ecasound v2.9.1 (C) 1997-2014 Kai Vehmanen and others > ************************************************************************** > (eca-chainsetup) Chainsetup "untitled-chainsetup" > (eca-chainsetup) NOTE: Real-time configuration, but insufficient privileges > ... to utilize real-time scheduling (SCHED_FIFO). With small buffersizes, > ... this may cause audible glitches during processing. > (eca-chainsetup) "rt" buffering mode selected. > (audioio_sndfile) Using libsndfile to open file "3canali.wav" for reading. > (eca-chainsetup) NOTE: using existing audio parameters -f:s16_le,3,48000 > ... for object 'sndfile' (tried to open with -f:s16_le,2,44100). > (eca-chainsetup) Opened input "sndfile", mode "read". Format: s16_le, > ... channels 3, srate 48000, interleaved (locked params). > ERROR: Connecting chainsetup failed: "Enabling chainsetup: AUDIOIO-ALSA: > ... Channel count 2 is out of range!" >
Hi Rodolfo, I don't think there is a problem with ecasound. For comparison, you can try aplay -D <devicename> test.wav You get the device name from aplay -L. Please also show the output from cat /proc/asound/cards With your ecasound examples, the -a argument is not necessary, and selecting channels is not its purpose. cheers > Please help... > > Rodolfo > -- Joel Roth
