Hi list,
I've just install v0.17.5 and was getting S16_LE output with version 15 before
with my USB DAC. But since upgrading to latest version, it always wants to use
the S24_3LE format even though i'm playing 44.1/16bit mp3's?
I expect it should use 16bit format when playing 16bit files, and 24 when
playing those, although I have none to test. Why would it always want to output
as 24 being the default, whereas before it was 16 bit in earlier versions? I
thought i read somewhere too that 24bit support was added as of version ~16, is
that correct? I also read that mp3's get 'special treatment' because when I
play FLAC files they used the S16_LE interface. Also, should i be worried
about 16bit output versus 24? I'm kind of confused about how best to setup this
to get bit-perfect audio.
Here is the output of /proc/asound/card1/stream0
2010 REV 1.7 Audioengine D1 at usb-0000:00:1d.1-1, full sp : USB Audio
Playback: Status: Running Interface = 1 Altset = 1 URBs = 3 [ 8 8 8 ]
Packet Size = 600 Momentary freq = 44000 Hz (0x2c.0000) Feedback
Format = 10.14 Interface 1 Altset 1 Format: S24_3LE Channels: 2
Endpoint: 1 OUT (ASYNC) Rates: 96000, 88200, 48000, 44100, 32000 Interface
1 Altset 2 Format: S16_LE Channels: 2 Endpoint: 1 OUT (ASYNC)
Rates: 96000, 88200, 48000, 44100, 32000
In earlier versions the two interfaces switched places and it used S16_LE by
default.
Here is my ALSA config from mpd.conf. NOTE: I have tried all sorts of settings
to get it to be 16bit, but only explicitly setting format to be 44100:16:2 OR
*:16:2 makes it work, but I want to avoid that if at all possible so it will
play higher quality if available.
# An example of an ALSA output:#audio_output { type "alsa"
name "My ALSA Device" device "hw:1,0" #
optional# format "44100:16:2" # optional mixer_type
"none" # optional## mixer_device "default" #
optional## mixer_control "PCM" # optional## mixer_index
"0" # optional auto_format "no" auto_resample
"no"}
Thanks!
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