Hi.
But DSD playback is not performed- tested on DSD64 and DSD128 sources. Special indicator lits instead -Digital signal unlock indicator / In owners manual it means “the digital input signal from the digital device is not synchronized with this unit”. Also I found a version that this indicator means that DAC cant detect source type.
Besides - such files are played if DAC is connected to Windows PC from native Luxman player application (thу simplest one- with only one function- play a file).
I also tried DSD over PCM in Volumio with no result (DAC doesn’t support this mode).
Can anyone suggest- what could be the next step?
gkkpch
October 12, 2021, 9:02pm
2
could you tell us which version of Volumio (please don’t say “latest”) you are using and please give us output from “lsusb”?
Thanks gkkpch for a quick answer.
Volumio 2.909. RaspberryPI 3b+.
Here is the entire output of lsusb
And here comes the verbose output if it could be helpful
Bus 001 Device 004: ID 0424:7800 Standard Microsystems Corp.
Bus 001 Device 003: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 002: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
gkkpch
October 13, 2021, 7:16am
4
There is no DSD support for device 1852:5066 in kernel 4.19.y, used with Volumio 2.
Mmm.
Is there an option to do it somehow without Luxman? I don’t think they will. May be some workaround?
And the second question- how did you get this info- is there a regisrty of supported devices? I’m thinking about changing the DAC (Accuphase) and looking for option to check compatibility with Volumio before purchasing. I saw a registry of supported DACs in this forum, but there is no information on target model.
1 Like
gkkpch
October 13, 2021, 10:23am
6
Unfortunately not, for RPi we take the kernel package straight from the Rap erry foundation, for X86 we take the kernel directly from kernel.org and only compile. The only thing that works is a simple modification of the quirk list in the audio driver, that is Luxman’s job to initiate, there is no workaround.
It is a hard-coded list in the audio driver sources, which is where I get my info from.
Can I do it for myself? For sure it will be wiped out with every release, but I can return it back. Is it a compiled module or a configuration file?
P.S.
https://github.com/torvalds/linux/blob/f4d0cc426f77df6890aa868f96c2de89686aae8a/sound/usb/quirks.c#L1300
and I should add something like
case USB_ID(0x1852, 0x5066): /* Luxman */
and than recompile wherever this source is included. A tricky way, but will it help?
I’m also thinking about request to Luxman team, but I need to have correct explanation- what they have to do.
gkkpch
October 13, 2021, 1:08pm
8
You would have to recompile the exact same kernel version as used for Volumio, grab the compiled
You modification is not quite complete and not in the right place.snd_usb_interface_dsd_format_quirks
usleep_range(5000, 6000);
}
/*
* snd_usb_interface_dsd_format_quirks() is called from format.c to
* augment the PCM format bit-field for DSD types. The UAC standards
* don't have a designated bit field to denote DSD-capable interfaces,
* hence all hardware that is known to support this format has to be
* listed here.
*/
u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
struct audioformat *fp,
unsigned int sample_bytes)
{
struct usb_interface *iface;
/* Playback Designs */
if (USB_ID_VENDOR(chip->usb_id) == 0x23ba &&
USB_ID_PRODUCT(chip->usb_id) < 0x0110) {
switch (fp->altsetting) {
case 1:
You need to find out, whether DSD capability is on altset 2 or 3.cat /proc/asound/card5/stream0 to find that.
I would advice against it, but it is not forbidden if you know what you are doing :))
I see this line
https://github.com/torvalds/linux/blob/f4d0cc426f77df6890aa868f96c2de89686aae8a/sound/usb/quirks.c#L1849
And I see kernel patch- how it was introduced.
https://github.com/torvalds/linux/commit/71426535f49fe6034d0e0db77608b91a0c1a022d
It describes another model (actually a successor of my DAC). and they differ in second field 0x5065 for DA-06 versus 0x5066 for DA-250.
Can you please check- is this one included to Volumio 2/3?
And another question- How could I enable automatic DSD resampling to PCM? Currently I see no such option for DSD playback mode.
gkkpch
October 13, 2021, 9:18pm
11
No, there are no entries for DA-06 or DA-250.
usleep_range(5000, 6000);
}
/*
* snd_usb_interface_dsd_format_quirks() is called from format.c to
* augment the PCM format bit-field for DSD types. The UAC standards
* don't have a designated bit field to denote DSD-capable interfaces,
* hence all hardware that is known to support this format has to be
* listed here.
*/
u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
struct audioformat *fp,
unsigned int sample_bytes)
{
struct usb_interface *iface;
/* Playback Designs */
if (USB_ID_VENDOR(chip->usb_id) == 0x23ba &&
USB_ID_PRODUCT(chip->usb_id) < 0x0110) {
switch (fp->altsetting) {
case 1:
Above is kernel 5.10.y, so not even in the latest longterm support version.
gkkpch
October 13, 2021, 10:16pm
13
You are right, DA-06 seems to have a specific interface and is handled differently. But this does not change anything:
we don’t know whether da-250 has the same interface
da-250 is not supported anyway
Again, this is where my support ends, please ask Luxman, there is nothing Volumio can do to change it.
Great thanks for your help , gkkpch. You really helped me a lot.