Re: iec958 and 24-bit audio

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>> [alsa-lib]$ aplay -Diec958 file24bits.wav
>> aplay: set_params:1059: Sample format non available
>> Available formats:
>> - S16_LE
>> - S32_LE
>> Is there an built-in assumption that the iec958 device can only take
>> as input what the slave hardware device supports?
> Use 'plug:iec958' device if you want to do the format conversion (from
> 24-bit to 32-bit format).

That seems to work, but what I was asking is if there's a direct path
without conversion? With plug:iec958 there's a conversion to 32-bits
and then you drop the lsb.
Also PulseAudio seems to rely on iec958 and when it doesn't work it
tries with plug:iec958. What's the recommended way of using this
device? Should we always open plug:iec958?
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