Date: Wed, 28 Nov 2018 11:22:14 +0100 From: Hans Petter Selasky <hps@selasky.org> To: Brian Scott <bscott@bunyatech.com.au>, freebsd-arm@freebsd.org Subject: Re: Raspberry PI 2B/3 and USB audio Message-ID: <c08832bf-73a0-11aa-729e-bcd4f44cbb39@selasky.org> In-Reply-To: <eeca436f-a5b3-2017-9a8d-41c8365dd46b@bunyatech.com.au> References: <87ftw96uq0.wl-herbert@gojira.at> <6beca923-ba25-3814-6bb2-f4cc2d7360d3@selasky.org> <875zx2hyey.wl-herbert@gojira.at> <87lg5fhcgz.wl-herbert@gojira.at> <87k1kzhb8j.wl-herbert@gojira.at> <9dda25f1-9b52-2a50-1b55-00cccee8ee98@selasky.org> <856136a7-c58f-dda0-d50c-f9da55e5eb88@bunyatech.com.au> <b5d07fe0-8b1a-9b59-3241-1bfe7f72b096@selasky.org> <eeca436f-a5b3-2017-9a8d-41c8365dd46b@bunyatech.com.au>
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On 11/28/18 11:13 AM, Brian Scott wrote:
> On 28/11/18 7:45 pm, Hans Petter Selasky wrote:
>> On 11/28/18 1:46 AM, Brian Scott wrote:
>>> On 27/11/18 6:38 pm, Hans Petter Selasky wrote:
>>>> On 11/26/18 8:47 PM, Herbert J. Skuhra wrote:
>>>>> Well, this USB sound card works perfectly fine on my desktop PC
>>>>> running FreeBSD (amd64).
>>>>
>>>> Hi,
>>>>
>>>> There is a problem in the DWC OTG USB controller driver that it cannot
>>>> handle the big data payload 24-bit 48KHz sampling requires.
>>>> Unfortunately your device has only one sample size selection.
>>>>
>>>> If you buy a USB sound device marked as "HIGH SPEED USB" it should
>>>> work. Yours is "spd=FULL".
>>>>
>>>> --HPS
>>> Just an additional data point,
>>>
>>> This one also sounds like junk but is high speed:
>>>
>>> ugen0.6: <Generic USB Audio> at usbus0, cfg=0 md=HOST spd=HIGH
>>> (480Mbps) pwr=ON (100mA)
>>>
>>> bLength = 0x0012
>>> bDescriptorType = 0x0001
>>> bcdUSB = 0x0200
>>> bDeviceClass = 0x0000 <Probed by interface class>
>>> bDeviceSubClass = 0x0000
>>> bDeviceProtocol = 0x0000
>>> bMaxPacketSize0 = 0x0040
>>> idVendor = 0x0bda
>>> idProduct = 0x4040
>>> bcdDevice = 0x0000
>>> iManufacturer = 0x0003 <Generic>
>>> iProduct = 0x0001 <USB Audio>
>>> iSerialNumber = 0x0002 <201405280001>
>>> bNumConfigurations = 0x0001
>>>
>>> But I notice that it handles both 48000 and 8000 according to the sound
>>> driver.
>>>
>>> cat /dev/sndstat
>>> FreeBSD Audio Driver (64bit 2009061500/aarch64)
>>> Installed devices:
>>> pcm0: <USB audio> at ? kld snd_uaudio (1p:1v/1r:1v) default
>>> snddev flags=0x2e2<AUTOVCHAN,BUSY,MPSAFE,REGISTERED,VPC>
>>> [pcm0:play:dsp0.p0]: spd 48000, fmt 0x00200010, flags
>>> 0x00002100, 0x00000004
>>> interrupts 0, underruns 0, feed 0, ready 0
>>> [b:3072/1536/2|bs:4096/2048/2]
>>> channel flags=0x2100<BUSY,HAS_VCHAN>
>>> {userland} -> feeder_mixer(0x00200010) -> {hardware}
>>> pcm0:play:dsp0.p0[pcm0:virtual:dsp0.vp0]: spd 8000, fmt
>>> 0x00100008, flags 0x10000000, 0x00000000
>>> interrupts 0, underruns 0, feed 0, ready 0 [b:0/0/0|bs:0/0/0]
>>> channel flags=0x10000000<VIRTUAL>
>>> {userland} -> feeder_root(0x00000000) -> {hardware}
>>> [pcm0:record:dsp0.r0]: spd 48000,fmt 0x00200010/0x00210000,
>>> flags 0x00002100, 0x00000007
>>> interrupts 0, overruns 0, feed 0, hfree 4608, sfree 4096
>>> [b:4608/2304/2|bs:4096/2048/2]
>>> channel flags=0x2100<BUSY,HAS_VCHAN>
>>> {hardware} -> feeder_root(0x00210000) ->
>>> feeder_format(0x00210000 -> 0x00200010) -> feeder_mixer(0x00200010)
>>> -> {userland}
>>> pcm0:record:dsp0.r0[pcm0:virtual:dsp0.vr0]: spd 8000, fmt
>>> 0x00100008, flags 0x10000000, 0x00000000
>>> interrupts 0, overruns 0, feed 0, hfree 0, sfree 0
>>> [b:0/0/0|bs:0/0/0]
>>> channel flags=0x10000000<VIRTUAL>
>>> {hardware} -> feeder_root(0x00000000) -> {userland}
>>> No devices installed from userspace.
>>>
>>> Output sounds like rubbish with both 8000 speed stuff sent directly to
>>> /dev/dsp using cat and higher quality stuff sent via sox play.
>>>
>>> It could also just be a junk piece of hardware from my local electronics
>>> shop.
>>
>> Which version of FreeBSD is this?
>>
>> Can you show dmesg?
>>
>> --HPS
>>
> 12.0 RC2 with /boot and /boot/msdos on sdcard and everything else on USB
> connected hard drive (causing interference with the bus?). Otherwise
> everything directly off the RC2 image + packages and a bit of configuration.
>
> On repeating my tests (probably last done a few months ago with the
> current snapshot) the sound was much better than I remember (almost
> recognisable!). Maybe having the non-debug kernel is helping. Hope this
> isn't a red herring.
>
Can you set the:
sysctl dev.pcm.0.play.vchanrate=48000
sysctl dev.pcm.0.rec.vchanrate=48000
And try again?
--HPS
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