[LAU] re Zoom R16

[Jan Depner]

On Wed, 2013-10-23 at 10:02 +0200, Set Hallstrom wrote:
> Hi!
> 
> >> Plus, I don't know how to change the sample rate on the device.
> >> There is no control exposed for alsamixer, and I cannot change it
> >> from the device itself. When I tested it, as soon I started jackd
> >> the device changed the sample rate to 96kHz (when I was trying 48kHz
> >> from the jackd command, and the device was at 44.1kHz before), and
> >> (q)jack(ctl)d stopped like waiting for the device.
> 
> I'm 99% sure you can only switch the bitrate on the r16 from 16-bits to
> 24-bits. The samplerate is always set to 44.1kHz.
> 

The bitrate is either 16 or 24.  The samplerate is only restricted to
44.1KHz as a standalone unit.  When used as a computer sound interface
you are supposed to be able to set it at the usual places between
44.1KHz and 96KHz.

On a related yet unrelated note, I have two of these and use them in a
master/slave configuration to record gigs using direct outs from our
board.  I did have to make a couple of 8 port, 50dB L-pad boxes though
because the inputs on the R-16 are expecting line input at consumer
level (-10dBV) while the board puts out pro level (+4dBu).  If anyone is
interested in the L-pad boxes I've posted a tutorial on my web page:

https://googledrive.com/host/0Bw2lTTCOj0kBeGdrbGVqNXJaODA/ZR16.html

I've since found that I should have made them 40dB so now I have to swap
out the 33K ohm resistors for 10K ohm.  Oh well ;-)


> Perhaps configuring jack to use 44.1 will solve the problem?
> 
> Just a thaught, i still havn't got my thumb out to try Clemens Patch :/
> 
> Have a good awoken time y'all!
> 
> *set
> 
> 
> On 2013-10-21 22:57, Natanael Olaiz wrote:
> > El 10/18/2013 10:04 PM, Natanael Olaiz escribió:
> >> El 10/18/2013 08:27 AM, Clemens Ladisch escribió:
> >>> Natanael Olaiz wrote:
> >>>
> >>>> [...]
> >>>> On the other hand, audio doesn't seem to works straightforward. The
> >>>> device is seen, but I was not able to make it work with jack nor aplay.
> >>>
> >>> What happens?
> >>>
> >> I think it had some trouble with the sample rate or some of the other
> >> defined arguments, but I still didn't had many time to try different
> >> combinations...
> >>
> >> Plus, I don't know how to change the sample rate on the device. There is
> >> no control exposed for alsamixer, and I cannot change it from the device
> >> itself. When I tested it, as soon I started jackd the device changed the
> >> sample rate to 96kHz (when I was trying 48kHz from the jackd command,
> >> and the device was at 44.1kHz before), and (q)jack(ctl)d stopped like
> >> waiting for the device.
> >>
> >> ...
> >>
> >> But after my previous mail I tried again with alsa_in on a running 48kHz
> >> jackd server (Focusrite Saffire), and it worked!!!! I was able to use
> >> all the 8 input channels!!! (my impression was an incredibly -for the
> >> price...- clean sound!)
> >>
> >> I tried then adding an alsa_out (at the same time than alsa_in), but it
> >> said the device was already in use (I have a H2n and as far I can
> >> remember I can execute both together...)
> > I'm using the R16 as MIDI controller [R16 -> a2jmidid (alsa midi)->
> > (jack midi) ardour3] and audio capture [R16 -> alsa_in (alsa device with
> > 8 input channels) -> ffado jack host].
> > 
> > It seems to work quite well when is running, but there is something not
> > fine:
> > 
> >  - it takes a long time to the device to appears as an alsa device since
> > it is detected from the kernel module
> > 
> >  - at least when it is not used (but I think it can occurs even when
> > streaming) it seems to block ALSA for moments. Meanwhile alsa seems is
> > unresponsive. Trying to start qjackctl (just open the frontend, not even
> > starting jack) opened an unresponsive widget. As soon I disconnected the
> > USB from the R16, the buttons and the control of the widget appeared.
> > 
> > - I was with the above described chain (jack + R16 alsa_in) , and all
> > the audio devices suddenly hanged. I saw in the R16 the sample rate at
> > 96kHz (when it was -as JACK- at 48kHz)
> > 
> > A dmesg shows this :
> > 
> >> [  268.877864] 3:1:1: cannot get freq at ep 0x3
> >> [  272.489903] firewire_core 0000:07:00.0: created device fw1: GUID
> >> 00130e0100060dce, S400
> >> [  273.879240] 3:1:1: cannot set freq 44100 to ep 0x3
> >> [  278.903419] 3:1:1: cannot get freq at ep 0x3
> >> [  283.904662] 3:1:1: cannot set freq 44100 to ep 0x3
> >> [  286.633916] 3:1:1: cannot get freq at ep 0x3
> >> [  286.638154] 3:1:1: cannot set freq 44100 to ep 0x3
> >> [  286.671291] 3:1:1: usb_set_interface failed (-71)
> >> [  286.675542] 3:1:1: usb_set_interface failed (-71)
> >> [  286.679792] 3:1:1: usb_set_interface failed (-71)
> >>  "" * 20
> >> [  286.799821] 3:1:1: usb_set_interface failed (-71)
> >> [  286.830497] usb 1-1.4: USB disconnect, device number 3
> >> [  304.980599] hda-intel: IRQ timing workaround is activated for card
> >> #0. Suggest a bigger bdl_pos_adj.
> >> [  305.930727] usb 1-1.4: new high-speed USB device number 4 using
> >> ehci-pci
> >> [  306.022714] usb 1-1.4: config 1 interface 3 altsetting 0 bulk
> >> endpoint 0x1 has invalid maxpacket 64
> >> [  306.022717] usb 1-1.4: config 1 interface 3 altsetting 0 bulk
> >> endpoint 0x82 has invalid maxpacket 64
> >> [  306.023508] usb 1-1.4: New USB device found, idVendor=1686,
> >> idProduct=00dd
> >> [  306.023513] usb 1-1.4: New USB device strings: Mfr=1, Product=2,
> >> SerialNumber=3
> >> [  306.023515] usb 1-1.4: Product: R16
> >> [  306.023517] usb 1-1.4: Manufacturer: ZOOM Corporation
> >> [  306.023519] usb 1-1.4: SerialNumber: 0
> >> [  311.025093] 4:1:1: cannot get freq at ep 0x3
> >> [  321.027467] 4:2:1: cannot get freq at ep 0x84
> >> [  331.090900] 4:1:1: cannot get freq at ep 0x3
> >> [  336.092152] 4:1:1: cannot set freq 44100 to ep 0x3
> >> [  341.115367] 4:1:1: cannot get freq at ep 0x3
> >> [  346.116557] 4:1:1: cannot get freq at ep 0x3
> >> [  356.273029] 4:1:1: cannot get freq at ep 0x3
> >> [  358.352531] 4:2:1: usb_set_interface failed (-110)
> >> [  820.268089] 4:1:1: cannot get freq at ep 0x3
> >> [  825.269267] 4:1:1: cannot set freq 44100 to ep 0x3
> > 
> > Any hint?
> > 
> > 
> > Thanks in advance,
> > Natanael.
> > 
> > 
> >>
> >> Soon I'll do more controlled tests and I'll update you. But it look so
> >> good!! :-)
> >>
> >> Thanks a lot!!!
> >>
> >> Natanael.
> >>> Regards,
> >>> Clemens
> >>>
> > 
>