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!" Please help... Rodolfo