In my occasional, but ongoing, quest to try to debug some of the non-
functioning audio on newer Roland/Boss devices, I've managed to get hold of a
Roland SD-50 to do some comparisons.
The lsusb -v and the aplay -L output for the SD-50 are attached.
This device works with jack if I use a sample rate of 44100, buffer size 256,
3 periods/buffer. I can record and playback with no obvious issues.
However, I can't seem to get this device working directly with ALSA. If I try
playing back via audacity, the meter bars move, but there's no audio output.
If I try aplay as follows:
aplay -Dplughw:CARD=SD50 /usr/share/sounds/alsa/Front_Center.wav
It pauses for a second as if it's playing, but I get no audio output. If I use
the -v flag for aplay I get the following:
Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little
Endian, Rate 48000 Hz, Mono
Plug PCM: Rate conversion PCM (44100, sformat=S16_LE)
Converter: linear-interpolation
Protocol version: 10002
Its setup is:
stream : PLAYBACK
access : RW_INTERLEAVED
format : S16_LE
subformat : STD
channels : 1
rate : 48000
exact rate : 48000 (48000/1)
msbits : 16
buffer_size : 24000
period_size : 6000
period_time : 125011
tstamp_mode : NONE
period_step : 1
avail_min : 6000
period_event : 0
start_threshold : 24000
stop_threshold : 24000
silence_threshold: 0
silence_size : 0
boundary : 6755399441055744000
Slave: Route conversion PCM (sformat=S24_3LE)
Transformation table:
0 <- 0
1 <- 0
Its setup is:
stream : PLAYBACK
access : MMAP_INTERLEAVED
format : S16_LE
subformat : STD
channels : 1
rate : 44100
exact rate : 44100 (44100/1)
msbits : 16
buffer_size : 22051
period_size : 5513
period_time : 125011
tstamp_mode : NONE
period_step : 1
avail_min : 5513
period_event : 0
start_threshold : 16539
stop_threshold : 22051
silence_threshold: 0
silence_size : 0
boundary : 6206804711446675456
Slave: Hardware PCM card 2 'SD-50' device 0 subdevice 0
Its setup is:
stream : PLAYBACK
access : MMAP_INTERLEAVED
format : S24_3LE
subformat : STD
channels : 2
rate : 44100
exact rate : 44100 (44100/1)
msbits : 24
buffer_size : 22051
period_size : 5513
period_time : 125011
tstamp_mode : NONE
period_step : 1
avail_min : 5513
period_event : 0
start_threshold : 16539
stop_threshold : 22051
silence_threshold: 0
silence_size : 0
boundary : 6206804711446675456
appl_ptr : 0
hw_ptr : 0
I'm trying to work out why I'm unable to get any audio output with ALSA
directly, whilst it happily works with Jack. Any pointers are gratefully
received.
Cheers,
Keith
Bus 003 Device 002: ID 0582:0114 Roland Corp. SD-50
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 0
bDeviceProtocol 255
bMaxPacketSize0 64
idVendor 0x0582 Roland Corp.
idProduct 0x0114 SD-50
bcdDevice 1.00
iManufacturer 1 Roland
iProduct 2 SD-50
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 167
bNumInterfaces 3
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 480mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 2
bInterfaceProtocol 2
iInterface 0
** UNRECOGNIZED: 06 24 f1 01 00 00
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 2
bInterfaceProtocol 2
iInterface 0
** UNRECOGNIZED: 07 24 01 01 00 01 00
** UNRECOGNIZED: 0b 24 02 01 02 03 18 01 44 ac 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 9
Transfer Type Isochronous
Synch Type Adaptive
Usage Type Data
wMaxPacketSize 0x0140 1x 320 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 2
bInterfaceProtocol 1
iInterface 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 2
bInterfaceProtocol 1
iInterface 0
** UNRECOGNIZED: 07 24 01 07 00 01 00
** UNRECOGNIZED: 0b 24 02 01 02 03 18 01 44 ac 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0140 1x 320 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 3
bInterfaceProtocol 0
iInterface 0
** UNRECOGNIZED: 06 24 f1 02 03 03
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 1
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 3
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Device Status: 0x0000
(Bus Powered) sysdefault:CARD=SD50
SD-50, USB Audio
Default Audio Device
front:CARD=SD50,DEV=0
SD-50, USB Audio
Front speakers
surround40:CARD=SD50,DEV=0
SD-50, USB Audio
4.0 Surround output to Front and Rear speakers
surround41:CARD=SD50,DEV=0
SD-50, USB Audio
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=SD50,DEV=0
SD-50, USB Audio
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=SD50,DEV=0
SD-50, USB Audio
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=SD50,DEV=0
SD-50, USB Audio
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=SD50,DEV=0
SD-50, USB Audio
IEC958 (S/PDIF) Digital Audio Output
dmix:CARD=SD50,DEV=0
SD-50, USB Audio
Direct sample mixing device
dsnoop:CARD=SD50,DEV=0
SD-50, USB Audio
Direct sample snooping device
hw:CARD=SD50,DEV=0
SD-50, USB Audio
Direct hardware device without any conversions
plughw:CARD=SD50,DEV=0
SD-50, USB Audio
Hardware device with all software conversions_______________________________________________
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