I agree, it is not difficult to add the driver to the kernel. I tried the
hiFace 1 driver in three distributions so far:
- on the generic distribution (ubuntu), it compiles easily and works fine,
actually the sound is great when coupled with mpd
- on embedded distributions (voyage-mpd, Synology DSM 4.0), it is a bit
complex to compiles but it does not work yet (even with plughw)
I have to ask the author of the driver at the end of this week.
As for the USB numbering, an alternative is to use the alias "hiFace" for
the card, which is independent of the numbering, for example "hw:hiFace" or
"plughw:hiFace" (when possible, I prefer the former). You can see this
alias with "aplay -L" (capital L).
Cheers
-Roberto
On Tue, Nov 6, 2012 at 5:33 AM, Demian Martin <dem...@auraliti.com> wrote:
> There are two hurdles to getting a new sound device working in Linux. The
> first is the driver. I followed the link and figured out how to patch it
> into the Kernel I'm using and get it to compile successfully. It would be
> great to have the author submit it to Alsa and get it into the Kernel. I
> find these isolated drivers a pain to maintain. The second is getting the
> interface talking correctly. My suggestions follow.
>
> I'll have a HiFace here in a day to try but from the notes posted I would
> suggest you use this to test:
> aplay -v -D plughw:0,0 file.wav # the "plughw" tells alsa to reformat to
> match the device.
>
> New versions of mpd (16 and above) will format to 24 bit internally, but I
> use this for USB and it seems to always work. If not change it to plughw
> and
> try.
>
> audio_output {
> type "alsa"
> name "USB"
> device "hw:1" # optional
> mixer_device "none" # optional
> # mixer_device "hw:1" # optional
> # mixer_control "PCM" # optional
> # mixer_index "0" # optional
> }
>
> There is a way to restrict usb audio devices to enumerate to device 1 and
> up. I have forgotten how I did it.
> Demian
>
> > -----Original Message-----
> >
> > ---------- Forwarded message ----------
> > From: Martin Larsson <martin.larss...@gmail.com>
> > Date: Mon, Nov 5, 2012 at 7:23 PM
> > Subject: Re: [Voyage-linux] compiling kernel module for Hiface 1 drivers
> > To: Roberto Grossi <gro...@di.unipi.it>
> >
> >
> > Yeah I'm trying to NOT play 32bit :) Are you sure it played 96khz? and 44
> > worked as well? how did you configure alsa/mpd? Feels like i've tried
> > everything.
> >
> > thanks for the info
> >
> > best regards martin
> >
> >
> > On Mon, Nov 5, 2012 at 5:00 PM, Roberto Grossi <gro...@di.unipi.it>
> wrote:
> >
> > > My Dac can handle 24/192 but the hiFace is integrated in a Behringer
> > > 24/96, so this the max resolution I can check.
> > > Not sure that you need to use 32 bits any way
> > >
> > > Cheers
> > > Roberto
> > >
> > >
> > > On Mon, Nov 5, 2012 at 3:50 PM, Martin Larsson
> > <martin.larss...@gmail.com>wrote:
> > >
> > >> Can your dac handle 32bit input? According to an alsa guy I talked to
> > >> on IRC, the driver in its current state can only use 32bit.
> > >>
> > >> best regards
> > >> martin
> > >>
> > >>
> > >> On Mon, Nov 5, 2012 at 2:05 PM, Roberto Grossi
> > <gro...@di.unipi.it>wrote:
> > >>
> > >>> Sorry, I thought you had some special config. BTW, the author of the
> > >>> drive is from Pisa, so I'm going to meet him in few days since I live
> here.
> > >>>
> > >>> As for mpd, it does not resample in my case:
> > >>>
> > >>> cat /proc/asound/hiFace/pcm0p/sub0/hw_params
> > >>> access: MMAP_INTERLEAVED
> > >>> format: S32_LE
> > >>> subformat: STD
> > >>> channels: 2
> > >>> rate: 44100 (44100/1)
> > >>> period_size: 4096
> > >>> buffer_size: 8192
> > >>>
> > >>>
> > >>> Cheers
> > >>> -Roberto
>
>
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> http://list.voyage.hk/mailman/listinfo/voyage-linux
>
--
Roberto Grossi, Dipartimento di Informatica, Università di Pisa
Largo Bruno Pontecorvo 3, 56127 Pisa, Italy
http://www.di.unipi.it/~grossi, tel (+39)0502212793, fax (+39)0502212726
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