Hello
I have an obscure USB DAC, Starting Point Systems DAC3. I cannot get
it to work under Linux, it appears to be recognized but does not play
sound.
On my workstation I use Linux Mint 17.3 and I have disabled PulseAudio
and use ALSA instead (I am sure my ALSA config is correct because I
have used another USB DAC successfully. I have also tested with live
CDs of Lubuntu 16.04 and Knoppix 7.2, to no avail.
If I try to use aplay to play a wav I receive the following error:
aplay -D default test.wav
Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
aplay: pcm_write:1939: write error: No such device
syslog shows the following:
Jul 9 15:38:31 atlas kernel: [ 4805.148059] usb 7-2: USB disconnect,
device number 19
Jul 9 15:38:32 atlas kernel: [ 4805.532022] usb 7-2: new full-speed
USB device number 20 using uhci_hcd
Jul 9 15:38:32 atlas kernel: [ 4805.725024] usb 7-2: New USB device
found, idVendor=2504, idProduct=0201
Jul 9 15:38:32 atlas kernel: [ 4805.725029] usb 7-2: New USB device
strings: Mfr=1, Product=2, SerialNumber=3
Jul 9 15:38:32 atlas kernel: [ 4805.725032] usb 7-2: Product: TDA
1543 DAC 3 v1.4
Jul 9 15:38:32 atlas kernel: [ 4805.725034] usb 7-2: Manufacturer:
STARTING POINT SYSTEMS
Jul 9 15:38:32 atlas kernel: [ 4805.725035] usb 7-2: SerialNumber: [OMITTED}
Jul 9 15:38:32 atlas kernel: [ 4805.745018] usb 7-2: Warning!
Unlikely big volume range (=65535), cval->res is probably wrong.
Jul 9 15:38:32 atlas kernel: [ 4805.745023] usb 7-2: [2] FU [PCM
Playback Volume] ch = 1, val = -32768/32767/1
Jul 9 15:38:32 atlas mtp-probe: checking bus 7, device 20:
"/sys/devices/pci0000:00/0000:00:1d.1/usb7/7-2"
Jul 9 15:38:32 atlas mtp-probe: bus: 7, device: 20 was not an MTP device
I updated the kernel to the most recent available but it did not help.
An excerpt from alsa-info is as follows:
...
!!Kernel Information
!!------------------
Kernel release: 4.4.0-28-generic
Operating System: GNU/Linux
Architecture: x86_64
Processor: x86_64
SMP Enabled: No
!!ALSA Version
!!------------
Driver version: k4.4.0-28-generic
Library version: 1.0.27.2
Utilities version: 1.0.27.2
!!Loaded ALSA modules
!!-------------------
snd_hda_intel
snd_usb_audio
!!Sound Servers on this system
!!----------------------------
!!Soundcards recognised by ALSA
!!-----------------------------
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xf9ff8000 irq 29
1 [v14 ]: USB-Audio - TDA 1543 DAC 3 v1.4
STARTING POINT SYSTEMS TDA 1543 DAC 3 v1.4 at
usb-0000:00:1d.1-2, full speed
!!PCI Soundcards installed in the system
!!--------------------------------------
00:1b.0 Audio device: Intel Corporation 82801JI (ICH10 Family) HD
Audio Controller
!!Advanced information - PCI Vendor/Device/Subsystem ID's
!!--------------------------------------------------------
00:1b.0 0403: 8086:3a3e
Subsystem: 1043:8311
!!Modprobe options (Sound related)
!!--------------------------------
snd_atiixp_modem: index=-2
snd_intel8x0m: index=-2
snd_via82xx_modem: index=-2
snd_usb_caiaq: index=-2
snd_usb_ua101: index=-2
snd_usb_us122l: index=-2
snd_usb_usx2y: index=-2
snd_cmipci: mpu_port=0x330 fm_port=0x388
snd_pcsp: index=-2
!!Loaded sound module options
!!--------------------------
!!Module: snd_hda_intel
...
!!Module: snd_usb_audio
-ne
autoclock : Y
-ne
device_setup : 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
-ne
enable : Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y
-ne
id :
(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
-ne
ignore_ctl_error : N
-ne
index :
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
-ne
pid :
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
-ne
vid :
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
...
Any help or suggestions would be greatly appreciated.
Many thanks
John
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