Le quintidi 5 fructidor, an CCXXIII, bri...@aracnet.com a écrit : > ok. now i get it . i was confused by the link to the web-page you posted. > it seemed to indicate that you could get aplay to perform the conversion > by specifying the format with the -f option. clearly it can't do that.
The -f option specifies what format to assume from the file if it is not specified by the header. WAVE files have a header that specify the format; obviously, /dev/urandom (although if you are really lucky you could get Citizen Kane in Matroska/Daala/Opus from it; and Daala 1.0's source code). > this is very interesting, because if aplay can't convert the file format, > how is it getting converted ?? ALSA does the conversion, more precisely the plugin called "plug". Adding the "-D hw:0" option to aplay instructs it not to use any plugin. When things work, plugins help them working smoothly; when things do not work, plugins make it harder to understand. > also, i forgot to mention that I also put the following in > /etc/modprobe.d/alsa/base.conf > > options snd slots=snd_usb_audio,snd_hda_intel,snd_hda_intel > options snd_usb_audio index=0 vid=0x08bb pid=0x2704 > > My understanding is that this will cause the modules to be loaded in a > fixed order which would make the HW designations consistent. If possible, although I suspect it will have trouble working reliably with an USB device. > I believe now that's unnecessary since i'm now using "card A2" in my > .asoundrc file. You should show the resulting .asoundrc file, because it is very easy to break things in it. Regards, -- Nicolas George
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