06-06-2020, 04:43 PM
Hi at all.
premise: I have a raspberry pi4 and moodeaudio works very well!
however, I thought of using a raspberry pi zero w for electricity (I'm green, what can you do?
), so I can always keep it on.
so I did the installation and it works, but I feel clicks and pops. everything has remained unchanged (NAS source, and DAC) between the two configurations, only the raspberry changes.
I use a USB DAC with DSD1796 chip, in the bottom also place some logs.
even if I leave the file frequency or if I set 44.1 / 16 some clicks is noticeable, rarely anyway. if set to 192/24 the songs are unheard: at least a couple of clicks are heard every 5 seconds.
I tried some changes: bits and frequency, MPD version (use 6.5.2 2020-05-03, so I also tried with 0.22 of tests), left in performance, enabled the threads (and various combinations of these).
I tried the parameters
dwc_otg.speed = 1
dwc_otg.fiq_fix_enable = 1
dwc_otg.nak_holdoff_enable = 1
dwc_otg.fiq_fsm_enable = 0
I also tried to force the usb 1.1 mode
I thought it was a CPU problem but the usage is as described by others: 10% without oversampling at 16/44, and 50% at 24/192.
I think more than enough: all pocket MP3 players have smaller processors.
/ var / log / mpd does not report anything.
do you have ideas?
-----------------------------
S Y S T E M P A R A M E T E R S
moOde release = 6.5.2 2020-05-03</li>
Raspbian OS = 10.3
Linux kernel = 4.19.115+ #1305
Platform = Pi-Zero W 512MB v1.1
Architecture = armv6l (32-bit)
System uptime = up 41 minutes
Timezone = Europe/Rome
Current time = 2020-06-06 17:42:50
Host name = moode
Ethernet address = unassigned
Ethernet MAC = no adapter
WLAN address = 192.168.79.164
WLAN MAC = b8:27:eb:44:bc:7e
WLAN country = IT
SoC identifier = bcm2835
Core count = 1
Kernel timer freq = 100 Hz
SDCard freq = 50 MHz
USB boot = not available
Warranty = OK
Root size = 15G
Root used = 19%
Root available = 11G
Root expand = expanded
Memory free = 68 MB
Memory used = 90 MB
SoC temperature = 37.9°C
CPU governor = performance
Onboard WiFi = On
Onboard BT = On
HDMI output = Off
LED state = 0,1
Eth addr wait = Off
Max USB current = Off
USB (UAC2) fix = On
Pi-3B+ eth fix = Off
SSH term server = On
PHP-FPM version = 7.3.11
NGINX version = 1.14.2
SQLite3 version = 3.27.2
Hostapd version = 2.8-devel
WiringPi version = 2.50
RPi.GPIO version = 0.7.0
A U D I O P A R A M E T E R S
Audio device = USB audio device
Interface = USB
Mixer name = HIFI-Ref Output
Hardware volume = Controller detected
Max ALSA volume = 100
Max MPD volume = 100
Volume step limit = 10
Audio source = Local
Output device = Local
Resume MPD = No
Volume knob = 0
Volume mute = Unmuted
Saved MPD vol = 0
Preamp volume = 0
ALSA version = 1.1.8-1+rpt1
SoX version = 0.1.2-3
Bluetooth controller = On
Pairing agent = On
Airplay receiver = Off
Spotify receiver = Off
Squeezelite = Off
UPnP client = Off
DLNA server = Off
GPIO button handler = Off
UPnP browser = Off
Auto-shuffle = Off
Autoplay = Off
Rotary encoder = Off
Encoder params = 100 2 3 23 24
USB volume knob = Off
Polarity inversion = Off
Crossfeed = Off
Crossfade = Off
Parametric EQ = Off
Graphic EQ = Off
MPD httpd = Off
A P P E A R A N C E S E T T I N G S
Themes and backgrounds
----------------------
Theme = Default
Accent color = Emerald
Alpha blend = 1.0
Adaptive background = No
Background image = No
Cover backdrop = No
Cover blur = 20px
Cover scale = 1.25
Library options
----------------------
Instant play action = Add/Play
Show tagview genres = Yes
Show tagview covers = Yes
Ellipsis limited text = No
Albumview sort order = by Artist
Tagview sort order = by Artist
Compilation identifier = Various Artists
Recently added = 1 Month
Ignore articles = a,an,the
UTF8 character filter = No
Hi-res thumbs = Auto
Cover search pri = Embedded cover
Pixel ratio = 2.375
Coverview screen saver
----------------------
CoverView auto-display = Never
CoverView style = Gradient (Linear)
Other options
----------------------
Font size = Normal
Auto-shuffle filter = None
Extra metadata = track,disc,date,composer,encoded
Playback history = No
M P D S E T T I N G S
Version = 0.22~git
Volume control = hardware
ALSA device = hw:1
SoX resampling = 96000:24:2
SoX quality = very high
SoX multithreading = on
DSD over PCM (DoP) = no
Replaygain = off
Replaygain preamp = 0
Volume normalization = No
Audio buffer = 4096 (kb)
Output buffer size = 131072 (kb)
B L U E T O O T H S E T T I N G S
Bluetooth ver = 5.50
Bluealsa ver = 2.0.0
Speaker sharing = No
Resume MPD = No
PCM buffer time = 500000 (μs)
M O O D E S T A R T U P L O G
20200606 170210 worker: -- Start
20200606 170210 worker: Successfully daemonized
20200606 170211 worker: Integrity check (passed)
20200606 170211 worker: Session loaded
20200606 170211 worker: Debug logging (off)
20200606 170211 worker: Device raw: (0:ALSA|1:HIFIRef|i2s:none)
20200606 170211 worker: Device cfg: (USB audio device|1|1|HIFI-Ref Output|0)
20200606 170214 worker: ALSA volume set to (0%)
20200606 170214 moode.php: MPD connect failed: cmd=(playlist)
20200606 170215 worker: -- System
20200606 170219 worker: Host (moode)
20200606 170219 worker: moOde (6.5.2 2020-05-03)
20200606 170219 worker: Raspbian (10.3)
20200606 170219 worker: Kernel (4.19.115+ #1305)
20200606 170219 worker: Platform (Pi-Zero W 512MB v1.1)
20200606 170219 worker: ARM arch (armv6l, 32-bit kernel)
20200606 170219 worker: MPD ver (0.22~git)
20200606 170219 worker: CPU gov (performance)
20200606 170219 worker: USB boot not available
20200606 170219 worker: File system expanded
20200606 170220 worker: HDMI port off
20200606 170222 worker: File check (OK)
20200606 170222 worker: -- Network
20200606 170222 worker: eth0 does not exist
20200606 170222 worker: eth0 address not assigned
20200606 170222 worker: wlan0 exists
20200606 170222 worker: wifi country (IT)
20200606 170222 worker: wlan0 trying SSID (mAo)
20200606 170223 worker: IP addr (192.168.79.164)
20200606 170223 worker: Netmask (255.255.255.0)
20200606 170223 worker: Gateway (192.168.79.254)
20200606 170224 worker: Pri DNS (8.8.8.8)
20200606 170224 worker: Domain (1.1.1.1)
20200606 170224 worker: -- Audio
20200606 170238 worker: ALSA outputs unmuted
20200606 170238 worker: ALSA card number (1)
20200606 170238 worker: Audio output (USB audio device)
20200606 170238 worker: Audio formats (S32_LE, SPECIAL, DSD_U32_BE)
20200606 170239 worker: ALSA mixer name (HIFI-Ref Output)
20200606 170239 worker: MPD volume control (hardware)
20200606 170239 worker: Hdwr volume controller exists
20200606 170239 worker: Max ALSA volume (100%)
20200606 170239 worker: Reset renderer active flags
20200606 170239 worker: -- MPD
20200606 170241 worker: MPD conf updated
20200606 170242 worker: MPD started
20200606 170244 worker: MPD accepting connections
20200606 170244 worker: Configure MPD outputs
20200606 170244 worker: MPD output 1 ALSA default (on)
20200606 170244 worker: MPD output 2 ALSA crossfeed (off)
20200606 170244 worker: MPD output 3 ALSA parametric eq (off)
20200606 170244 worker: MPD output 4 ALSA graphic eq (off)
20200606 170244 worker: MPD output 5 ALSA polarity inversion (off)
20200606 170244 worker: MPD output 6 ALSA bluetooth (off)
20200606 170244 worker: MPD output 7 HTTP stream (off)
20200606 170244 worker: MPD crossfade (off)
20200606 170244 worker: -- Feature availability
20200606 170244 worker: Source select (available)
20200606 170244 worker: Source select (source: MPD)
20200606 170244 worker: Source select (output: USB audio device)
20200606 170244 worker: Bluetooth (available)
20200606 170244 worker: Bluetooth (started)
20200606 170252 worker: Bluetooth pairing agent (started)
20200606 170253 worker: Airplay renderer (available)
20200606 170253 worker: Spotify renderer (available)
20200606 170253 worker: Squeezelite renderer (available)
20200606 170253 worker: UPnP renderer (available)
20200606 170253 worker: DLNA server (available)
20200606 170253 worker: UPnP browser (available)
20200606 170253 worker: Audio scrobbler (available)
20200606 170253 worker: GPIO button handler (available)
20200606 170253 worker: -- Music sources
20200606 170253 worker: USB sources (none attached)
20200606 170256 worker: NAS and UPnP sources (mountall initiated)
20200606 170256 worker: -- Miscellaneous
20200606 170256 worker: USB volume knob (Off)
20200606 170256 worker: Shellinabox SSH started
20200606 170256 worker: USB auto-mounter (udisks-glue)
20200606 170257 worker: LED0 (Off)
20200606 170257 worker: LED1 (sysclass does not exist)
20200606 170257 worker: Saved MPD vol level (0)
20200606 170257 worker: Preamp volume level (0)
20200606 170257 worker: MPD volume level (0) restored
20200606 170258 worker: ALSA volume level (0%)
20200606 170258 worker: Auto-play (Off)
20200606 170258 worker: Maintenance interval (3 hrs)
20200606 170258 worker: Screen saver activation (Never)
20200606 170258 worker: Session permissions (OK)
20200606 170258 worker: Watchdog started
20200606 170258 worker: Ready
pi@moode:~ $ usb-devices
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 1
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0002 Rev=04.19
S: Manufacturer=Linux 4.19.115+ dwc_otg_hcd
S: Product=DWC OTG Controller
S: SerialNumber=20980000.usb
C: #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
I: If#=0x0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 2
P: Vendor=20b1 ProdID=000a Rev=06.60
S: Manufacturer=XMOS
S: Product=HIFI-Ref
C: #Ifs= 3 Cfg#= 1 Atr=80 MxPwr=500mA
I: If#=0x0 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=20 Driver=snd-usb-audio
I: If#=0x1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
I: If#=0x2 Alt= 0 #EPs= 0 Cls=fe(app. ) Sub=01 Prot=01 Driver=(none)
*** Scanning for playback devices ***
Card 0, ID `ALSA', name `bcm2835 ALSA'
Device 0, ID `bcm2835 ALSA', name `bcm2835 ALSA', 7 subdevices (7 available)
1..2 channels, sampling rate 8000..192000 Hz
Sample formats: U8, S16_LE
Buffer size range from 256 to 131072
Period size range from 256 to 131072
Subdevice 0, name `subdevice #0'
Subdevice 1, name `subdevice #1'
Subdevice 2, name `subdevice #2'
Subdevice 3, name `subdevice #3'
Subdevice 4, name `subdevice #4'
Subdevice 5, name `subdevice #5'
Subdevice 6, name `subdevice #6'
Device 1, ID `bcm2835 IEC958/HDMI', name `bcm2835 IEC958/HDMI', 1 subdevices (1 available)
2..8 channels, sampling rate 44100..192000 Hz
Sample formats: S16_LE
Buffer size range from 441 to 32768
Period size range from 441 to 32768
Subdevice 0, name `subdevice #0'
Device 2, ID `bcm2835 IEC958/HDMI1', name `bcm2835 IEC958/HDMI1', 1 subdevices (1 available)
2..8 channels, sampling rate 44100..192000 Hz
Sample formats: S16_LE
Buffer size range from 441 to 32768
Period size range from 441 to 32768
Subdevice 0, name `subdevice #0'
Card 1, ID `HIFIRef', name `HIFI-Ref'
Device 0, ID `USB Audio', name `USB Audio', 1 subdevices (1 available)
2 channels, sampling rate 44100..384000 Hz
Sample formats: S32_LE, SPECIAL, DSD_U32_BE
Buffer size range from 16 to 131072
Period size range from 8 to 65536
Subdevice 0, name `subdevice #0'
pi@moode:/home $ cat /proc/asound/card1/pcm0p/sub0/sw_params
tstamp_mode: NONE
period_step: 1
avail_min: 12000
start_threshold: 36000
stop_threshold: 48000
silence_threshold: 0
silence_size: 0
boundary: 1572864000
pi@moode:/home $ cat /proc/asound/card1/pcm0p/sub0/hw_params
access: RW_INTERLEAVED
format: S32_LE
subformat: STD
channels: 2
rate: 96000 (96000/1)
period_size: 12000
buffer_size: 48000
pi@moode:/home $ cat /proc/asound/card1/pcm0p/sub0/status
state: RUNNING
owner_pid : 1472
trigger_time: 2321.403261605
tstamp : 0.000000000
delay : 38259
avail : 9838
avail_max : 39954
-----
hw_ptr : 2781838
appl_ptr : 2820000
premise: I have a raspberry pi4 and moodeaudio works very well!
however, I thought of using a raspberry pi zero w for electricity (I'm green, what can you do?
), so I can always keep it on.so I did the installation and it works, but I feel clicks and pops. everything has remained unchanged (NAS source, and DAC) between the two configurations, only the raspberry changes.
I use a USB DAC with DSD1796 chip, in the bottom also place some logs.
even if I leave the file frequency or if I set 44.1 / 16 some clicks is noticeable, rarely anyway. if set to 192/24 the songs are unheard: at least a couple of clicks are heard every 5 seconds.
I tried some changes: bits and frequency, MPD version (use 6.5.2 2020-05-03, so I also tried with 0.22 of tests), left in performance, enabled the threads (and various combinations of these).
I tried the parameters
dwc_otg.speed = 1
dwc_otg.fiq_fix_enable = 1
dwc_otg.nak_holdoff_enable = 1
dwc_otg.fiq_fsm_enable = 0
I also tried to force the usb 1.1 mode
I thought it was a CPU problem but the usage is as described by others: 10% without oversampling at 16/44, and 50% at 24/192.
I think more than enough: all pocket MP3 players have smaller processors.
/ var / log / mpd does not report anything.
do you have ideas?
-----------------------------
S Y S T E M P A R A M E T E R S
moOde release = 6.5.2 2020-05-03</li>
Raspbian OS = 10.3
Linux kernel = 4.19.115+ #1305
Platform = Pi-Zero W 512MB v1.1
Architecture = armv6l (32-bit)
System uptime = up 41 minutes
Timezone = Europe/Rome
Current time = 2020-06-06 17:42:50
Host name = moode
Ethernet address = unassigned
Ethernet MAC = no adapter
WLAN address = 192.168.79.164
WLAN MAC = b8:27:eb:44:bc:7e
WLAN country = IT
SoC identifier = bcm2835
Core count = 1
Kernel timer freq = 100 Hz
SDCard freq = 50 MHz
USB boot = not available
Warranty = OK
Root size = 15G
Root used = 19%
Root available = 11G
Root expand = expanded
Memory free = 68 MB
Memory used = 90 MB
SoC temperature = 37.9°C
CPU governor = performance
Onboard WiFi = On
Onboard BT = On
HDMI output = Off
LED state = 0,1
Eth addr wait = Off
Max USB current = Off
USB (UAC2) fix = On
Pi-3B+ eth fix = Off
SSH term server = On
PHP-FPM version = 7.3.11
NGINX version = 1.14.2
SQLite3 version = 3.27.2
Hostapd version = 2.8-devel
WiringPi version = 2.50
RPi.GPIO version = 0.7.0
A U D I O P A R A M E T E R S
Audio device = USB audio device
Interface = USB
Mixer name = HIFI-Ref Output
Hardware volume = Controller detected
Max ALSA volume = 100
Max MPD volume = 100
Volume step limit = 10
Audio source = Local
Output device = Local
Resume MPD = No
Volume knob = 0
Volume mute = Unmuted
Saved MPD vol = 0
Preamp volume = 0
ALSA version = 1.1.8-1+rpt1
SoX version = 0.1.2-3
Bluetooth controller = On
Pairing agent = On
Airplay receiver = Off
Spotify receiver = Off
Squeezelite = Off
UPnP client = Off
DLNA server = Off
GPIO button handler = Off
UPnP browser = Off
Auto-shuffle = Off
Autoplay = Off
Rotary encoder = Off
Encoder params = 100 2 3 23 24
USB volume knob = Off
Polarity inversion = Off
Crossfeed = Off
Crossfade = Off
Parametric EQ = Off
Graphic EQ = Off
MPD httpd = Off
A P P E A R A N C E S E T T I N G S
Themes and backgrounds
----------------------
Theme = Default
Accent color = Emerald
Alpha blend = 1.0
Adaptive background = No
Background image = No
Cover backdrop = No
Cover blur = 20px
Cover scale = 1.25
Library options
----------------------
Instant play action = Add/Play
Show tagview genres = Yes
Show tagview covers = Yes
Ellipsis limited text = No
Albumview sort order = by Artist
Tagview sort order = by Artist
Compilation identifier = Various Artists
Recently added = 1 Month
Ignore articles = a,an,the
UTF8 character filter = No
Hi-res thumbs = Auto
Cover search pri = Embedded cover
Pixel ratio = 2.375
Coverview screen saver
----------------------
CoverView auto-display = Never
CoverView style = Gradient (Linear)
Other options
----------------------
Font size = Normal
Auto-shuffle filter = None
Extra metadata = track,disc,date,composer,encoded
Playback history = No
M P D S E T T I N G S
Version = 0.22~git
Volume control = hardware
ALSA device = hw:1
SoX resampling = 96000:24:2
SoX quality = very high
SoX multithreading = on
DSD over PCM (DoP) = no
Replaygain = off
Replaygain preamp = 0
Volume normalization = No
Audio buffer = 4096 (kb)
Output buffer size = 131072 (kb)
B L U E T O O T H S E T T I N G S
Bluetooth ver = 5.50
Bluealsa ver = 2.0.0
Speaker sharing = No
Resume MPD = No
PCM buffer time = 500000 (μs)
M O O D E S T A R T U P L O G
20200606 170210 worker: -- Start
20200606 170210 worker: Successfully daemonized
20200606 170211 worker: Integrity check (passed)
20200606 170211 worker: Session loaded
20200606 170211 worker: Debug logging (off)
20200606 170211 worker: Device raw: (0:ALSA|1:HIFIRef|i2s:none)
20200606 170211 worker: Device cfg: (USB audio device|1|1|HIFI-Ref Output|0)
20200606 170214 worker: ALSA volume set to (0%)
20200606 170214 moode.php: MPD connect failed: cmd=(playlist)
20200606 170215 worker: -- System
20200606 170219 worker: Host (moode)
20200606 170219 worker: moOde (6.5.2 2020-05-03)
20200606 170219 worker: Raspbian (10.3)
20200606 170219 worker: Kernel (4.19.115+ #1305)
20200606 170219 worker: Platform (Pi-Zero W 512MB v1.1)
20200606 170219 worker: ARM arch (armv6l, 32-bit kernel)
20200606 170219 worker: MPD ver (0.22~git)
20200606 170219 worker: CPU gov (performance)
20200606 170219 worker: USB boot not available
20200606 170219 worker: File system expanded
20200606 170220 worker: HDMI port off
20200606 170222 worker: File check (OK)
20200606 170222 worker: -- Network
20200606 170222 worker: eth0 does not exist
20200606 170222 worker: eth0 address not assigned
20200606 170222 worker: wlan0 exists
20200606 170222 worker: wifi country (IT)
20200606 170222 worker: wlan0 trying SSID (mAo)
20200606 170223 worker: IP addr (192.168.79.164)
20200606 170223 worker: Netmask (255.255.255.0)
20200606 170223 worker: Gateway (192.168.79.254)
20200606 170224 worker: Pri DNS (8.8.8.8)
20200606 170224 worker: Domain (1.1.1.1)
20200606 170224 worker: -- Audio
20200606 170238 worker: ALSA outputs unmuted
20200606 170238 worker: ALSA card number (1)
20200606 170238 worker: Audio output (USB audio device)
20200606 170238 worker: Audio formats (S32_LE, SPECIAL, DSD_U32_BE)
20200606 170239 worker: ALSA mixer name (HIFI-Ref Output)
20200606 170239 worker: MPD volume control (hardware)
20200606 170239 worker: Hdwr volume controller exists
20200606 170239 worker: Max ALSA volume (100%)
20200606 170239 worker: Reset renderer active flags
20200606 170239 worker: -- MPD
20200606 170241 worker: MPD conf updated
20200606 170242 worker: MPD started
20200606 170244 worker: MPD accepting connections
20200606 170244 worker: Configure MPD outputs
20200606 170244 worker: MPD output 1 ALSA default (on)
20200606 170244 worker: MPD output 2 ALSA crossfeed (off)
20200606 170244 worker: MPD output 3 ALSA parametric eq (off)
20200606 170244 worker: MPD output 4 ALSA graphic eq (off)
20200606 170244 worker: MPD output 5 ALSA polarity inversion (off)
20200606 170244 worker: MPD output 6 ALSA bluetooth (off)
20200606 170244 worker: MPD output 7 HTTP stream (off)
20200606 170244 worker: MPD crossfade (off)
20200606 170244 worker: -- Feature availability
20200606 170244 worker: Source select (available)
20200606 170244 worker: Source select (source: MPD)
20200606 170244 worker: Source select (output: USB audio device)
20200606 170244 worker: Bluetooth (available)
20200606 170244 worker: Bluetooth (started)
20200606 170252 worker: Bluetooth pairing agent (started)
20200606 170253 worker: Airplay renderer (available)
20200606 170253 worker: Spotify renderer (available)
20200606 170253 worker: Squeezelite renderer (available)
20200606 170253 worker: UPnP renderer (available)
20200606 170253 worker: DLNA server (available)
20200606 170253 worker: UPnP browser (available)
20200606 170253 worker: Audio scrobbler (available)
20200606 170253 worker: GPIO button handler (available)
20200606 170253 worker: -- Music sources
20200606 170253 worker: USB sources (none attached)
20200606 170256 worker: NAS and UPnP sources (mountall initiated)
20200606 170256 worker: -- Miscellaneous
20200606 170256 worker: USB volume knob (Off)
20200606 170256 worker: Shellinabox SSH started
20200606 170256 worker: USB auto-mounter (udisks-glue)
20200606 170257 worker: LED0 (Off)
20200606 170257 worker: LED1 (sysclass does not exist)
20200606 170257 worker: Saved MPD vol level (0)
20200606 170257 worker: Preamp volume level (0)
20200606 170257 worker: MPD volume level (0) restored
20200606 170258 worker: ALSA volume level (0%)
20200606 170258 worker: Auto-play (Off)
20200606 170258 worker: Maintenance interval (3 hrs)
20200606 170258 worker: Screen saver activation (Never)
20200606 170258 worker: Session permissions (OK)
20200606 170258 worker: Watchdog started
20200606 170258 worker: Ready
pi@moode:~ $ usb-devices
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 1
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0002 Rev=04.19
S: Manufacturer=Linux 4.19.115+ dwc_otg_hcd
S: Product=DWC OTG Controller
S: SerialNumber=20980000.usb
C: #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
I: If#=0x0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 2
P: Vendor=20b1 ProdID=000a Rev=06.60
S: Manufacturer=XMOS
S: Product=HIFI-Ref
C: #Ifs= 3 Cfg#= 1 Atr=80 MxPwr=500mA
I: If#=0x0 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=20 Driver=snd-usb-audio
I: If#=0x1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
I: If#=0x2 Alt= 0 #EPs= 0 Cls=fe(app. ) Sub=01 Prot=01 Driver=(none)
*** Scanning for playback devices ***
Card 0, ID `ALSA', name `bcm2835 ALSA'
Device 0, ID `bcm2835 ALSA', name `bcm2835 ALSA', 7 subdevices (7 available)
1..2 channels, sampling rate 8000..192000 Hz
Sample formats: U8, S16_LE
Buffer size range from 256 to 131072
Period size range from 256 to 131072
Subdevice 0, name `subdevice #0'
Subdevice 1, name `subdevice #1'
Subdevice 2, name `subdevice #2'
Subdevice 3, name `subdevice #3'
Subdevice 4, name `subdevice #4'
Subdevice 5, name `subdevice #5'
Subdevice 6, name `subdevice #6'
Device 1, ID `bcm2835 IEC958/HDMI', name `bcm2835 IEC958/HDMI', 1 subdevices (1 available)
2..8 channels, sampling rate 44100..192000 Hz
Sample formats: S16_LE
Buffer size range from 441 to 32768
Period size range from 441 to 32768
Subdevice 0, name `subdevice #0'
Device 2, ID `bcm2835 IEC958/HDMI1', name `bcm2835 IEC958/HDMI1', 1 subdevices (1 available)
2..8 channels, sampling rate 44100..192000 Hz
Sample formats: S16_LE
Buffer size range from 441 to 32768
Period size range from 441 to 32768
Subdevice 0, name `subdevice #0'
Card 1, ID `HIFIRef', name `HIFI-Ref'
Device 0, ID `USB Audio', name `USB Audio', 1 subdevices (1 available)
2 channels, sampling rate 44100..384000 Hz
Sample formats: S32_LE, SPECIAL, DSD_U32_BE
Buffer size range from 16 to 131072
Period size range from 8 to 65536
Subdevice 0, name `subdevice #0'
pi@moode:/home $ cat /proc/asound/card1/pcm0p/sub0/sw_params
tstamp_mode: NONE
period_step: 1
avail_min: 12000
start_threshold: 36000
stop_threshold: 48000
silence_threshold: 0
silence_size: 0
boundary: 1572864000
pi@moode:/home $ cat /proc/asound/card1/pcm0p/sub0/hw_params
access: RW_INTERLEAVED
format: S32_LE
subformat: STD
channels: 2
rate: 96000 (96000/1)
period_size: 12000
buffer_size: 48000
pi@moode:/home $ cat /proc/asound/card1/pcm0p/sub0/status
state: RUNNING
owner_pid : 1472
trigger_time: 2321.403261605
tstamp : 0.000000000
delay : 38259
avail : 9838
avail_max : 39954
-----
hw_ptr : 2781838
appl_ptr : 2820000