Hi,

I recently switched my desktop workstation to a raspberry pi 4B with 8 GB RAM.
Since the sound there doesn't work yet, I got a USB sound card, the make of
the sound card is best read from usbdevs -v:

addr 08: 0ccd:00b1 TerraTec Electronic GmbH, Aureon 7.1 USB
         full speed, power 500 mA, config 1, rev 0.10
         driver: uaudio0
         driver: ugen0

Like the other AUREON card in the usb drivers I put this in usb quirks to not
attach as a uhiddev (not sure if that was the right thing to do?).

Now to my real question:  mplayer sounds horrible, but iridium sound from 
youtube sounds OK.  There is a lot of static interference when I play with
mplayer.  So what is it doing different than iridium?  I tried messing with
audioctl buffer sizes and nblocks but I don't really know what I'm doing here,
so I'm writing to the list.  The sound did not improve when I messed with the
buffers.

Here is the output of mplayer when I play a song:

Playing [censored]
libavformat version 58.45.100 (external)
libavformat file format detected.
[lavf] stream 0: audio (flac), -aid 0
Load subtitles in ./
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
libavcodec version 58.91.100 (external)
AUDIO: 44100 Hz, 2 ch, s16le, 0.0 kbit/0.00% (ratio: 0->176400)
Selected audio codec: [ffflac] afm: ffmpeg (FFmpeg FLAC audio)
==========================================================================
AO: [sndio] 44100Hz 2ch s16le (2 bytes per sample)
Video: no video
Starting playback...
A:   1.3 (01.2) of 164.5 (02:44.5)  1.0% 

Immediately I heard static, at the time this was my audioctl output:

root@neptune# audioctl
name=uaudio0
mode=
pause=1
active=0
nblks=16
blksz=480
rate=48000
encoding=s16le
play.channels=2
play.bytes=0
play.errors=0
record.channels=2
record.bytes=0
record.errors=0

This is my dmesg:

OpenBSD 6.8 (GENERIC.MP) #1: Sun Jan 17 21:19:32 CET 2021
    p...@neptune.centroid.eu:/sys/arch/arm64/compile/GENERIC.MP
real mem  = 8378036224 (7989MB)
avail mem = 8088367104 (7713MB)
random: good seed from bootblocks
mainbus0 at root: ACPI
psci0 at mainbus0: PSCI 1.1, SMCCC 1.2
cpu0 at mainbus0 mpidr 0: ARM Cortex-A72 r0p3
cpu0: 48KB 64b/line 3-way L1 PIPT I-cache, 32KB 64b/line 2-way L1 D-cache
cpu0: 1024KB 64b/line 16-way L2 cache
cpu1 at mainbus0 mpidr 1: ARM Cortex-A72 r0p3
cpu1: 48KB 64b/line 3-way L1 PIPT I-cache, 32KB 64b/line 2-way L1 D-cache
cpu1: 1024KB 64b/line 16-way L2 cache
cpu2 at mainbus0 mpidr 2: ARM Cortex-A72 r0p3
cpu2: 48KB 64b/line 3-way L1 PIPT I-cache, 32KB 64b/line 2-way L1 D-cache
cpu2: 1024KB 64b/line 16-way L2 cache
cpu3 at mainbus0 mpidr 3: ARM Cortex-A72 r0p3
cpu3: 48KB 64b/line 3-way L1 PIPT I-cache, 32KB 64b/line 2-way L1 D-cache
cpu3: 1024KB 64b/line 16-way L2 cache
efi0 at mainbus0: UEFI 2.7
efi0: https://github.com/pftf/RPi4 rev 0x10000
smbios0 at efi0: SMBIOS 3.3.0
smbios0: vendor https://github.com/pftf/RPi4 version "UEFI Firmware v1.21" date 
11/13/2020
smbios0: Raspberry Pi Foundation Raspberry Pi 4 Model B
apm0 at mainbus0
ampintc0 at mainbus0 nirq 256, ncpu 4 ipi: 0, 1: "interrupt-controller"
agtimer0 at mainbus0: tick rate 54000 KHz
acpi0 at mainbus0: ACPI 6.3
acpi0: sleep states
acpi0: tables DSDT FACP CSRT DBG2 GTDT IORT APIC PPTT BGRT
acpi0: wakeup devices
"BCM2849" at acpi0 not configured
"BCM2835" at acpi0 not configured
"BCM2854" at acpi0 not configured
"ACPI0004" at acpi0 not configured
xhci0 at acpi0 XHC0 addr 0x600000000/0x1000 irq 175, xHCI 1.0
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 configuration 1 interface 0 "Generic xHCI root hub" rev 3.00/1.00 
addr 1
"ACPI0007" at acpi0 not configured
"ACPI0007" at acpi0 not configured
"ACPI0007" at acpi0 not configured
"ACPI0007" at acpi0 not configured
"ACPI0004" at acpi0 not configured
"BCM2848" at acpi0 not configured
"BCM2850" at acpi0 not configured
"BCM2856" at acpi0 not configured
"BCM2845" at acpi0 not configured
"BCM2841" at acpi0 not configured
"BCM2841" at acpi0 not configured
"BCM2838" at acpi0 not configured
"BCM2839" at acpi0 not configured
"BCM2844" at acpi0 not configured
pluart0 at acpi0 URT0 addr 0xfe201000/0x1000 irq 153
"BCM2836" at acpi0 not configured
"BCM2EA6" at acpi0 not configured
"MSFT8000" at acpi0 not configured
"BCM2847" at acpi0 not configured
"BCM2855" at acpi0 not configured
bse0 at acpi0 ETH0 addr 0xfd580000/0x10000 irq 189: address dc:a6:32:cc:db:a7
brgphy0 at bse0 phy 1: BCM54210E 10/100/1000baseT PHY, rev. 2
"PNP0C06" at acpi0 not configured
acpitz at acpi0 not configured
simplefb0 at mainbus0: 1920x1080, 32bpp
wsdisplay0 at simplefb0 mux 1: console (std, vt100 emulation)
wsdisplay0: screen 1-5 added (std, vt100 emulation)
uhub1 at uhub0 port 1 configuration 1 interface 0 "VIA Labs USB2.0 Hub" rev 2.10
/4.21 addr 2
uhidev0 at uhub1 port 1 configuration 1 interface 0 "American Power Conversion B
ack-UPS CS 650 FW:817.v9.I USB FW:v9" rev 1.10/0.06 addr 3
uhidev0: iclass 3/0, 98 report ids
upd0 at uhidev0
uhub2 at uhub1 port 2 configuration 1 interface 0 "Asmedia ASM107x" rev 2.10/1.0
0 addr 4
uhub3 at uhub1 port 3 configuration 1 interface 0 "Apple, Inc. Keyboard Hub" rev
 2.00/96.15 addr 5
uhidev1 at uhub3 port 2 configuration 1 interface 0 "Apple Inc. Apple Keyboard" 
rev 2.00/0.74 addr 6
uhidev1: iclass 3/1
ukbd0 at uhidev1: 8 variable keys, 5 key codes, country code 13
wskbd0 at ukbd0: console keyboard, using wsdisplay0
uhidev2 at uhub3 port 2 configuration 1 interface 1 "Apple Inc. Apple Keyboard" 
rev 2.00/0.74 addr 6
uhidev2: iclass 3/0
uhid0 at uhidev2: input=1, output=0, feature=0
uhidev3 at uhub3 port 3 configuration 1 interface 0 "Logitech USB Optical Mouse"
 rev 2.00/43.01 addr 7
uhidev3: iclass 3/1
ums0 at uhidev3: 3 buttons, Z dir
wsmouse0 at ums0 mux 0
uaudio0 at uhub1 port 4 configuration 1 interface 1 "TerraTec Electronic GmbH Au
reon 7.1 USB" rev 1.10/0.10 addr 8
uaudio0: class v1, full-speed, sync, channels: 8 play, 2 rec, 25 ctls
audio0 at uaudio0
ugen0 at uhub1 port 4 configuration 1 "TerraTec Electronic GmbH Aureon 7.1 USB" 
rev 1.10/0.10 addr 8
uhub4 at uhub0 port 3 configuration 1 interface 0 "Asmedia ASM107x" rev 3.00/1.0
0 addr 9
umass0 at uhub4 port 3 configuration 1 interface 0 "ASMT ASM105x" rev 3.00/1.00 
addr 10
umass0: using SCSI over Bulk-Only
scsibus0 at umass0: 2 targets, initiator 0
sd0 at scsibus0 targ 1 lun 0: <ASMT, ASM105x, 0> serial.174c55aa12345679B3D8
sd0: 953869MB, 512 bytes/sector, 1953525168 sectors
vscsi0 at root
scsibus1 at vscsi0: 256 targets
softraid0 at root
scsibus2 at softraid0: 256 targets
bootfile: sd0a:/bsd
boot device: sd0
root on sd0a (8c1699786972c1f6.a) swap on sd0b dump on sd0b
WARNING: clock lost 65 days
WARNING: CHECK AND RESET THE DATE!
iridium[14614]: pledge "", syscall 289
iridium[92842]: pledge "", syscall 289
iridium[61380]: pledge "", syscall 289
uaudio0: play xfer, err = 6
uaudio0: rec xfer, err = 6

And here is the usbdevs -v output:

Controller /dev/usb0:
addr 01: 0000:0000 Generic, xHCI root hub
         super speed, self powered, config 1, rev 1.00
         driver: uhub0
addr 02: 2109:3431 VIA Labs, USB2.0 Hub
         high speed, self powered, config 1, rev 4.21
         driver: uhub1
addr 03: 051d:0002 American Power Conversion, Back-UPS CS 650 FW:817.v9.I USB 
FW:v9
         low speed, self powered, config 1, rev 0.06, iSerial 4B1814P12028
         driver: uhidev0
addr 04: 174c:2074 Asmedia, ASM107x
         high speed, self powered, config 1, rev 1.00, iSerial 123456789ABCDEF
         driver: uhub2
addr 05: 05ac:1006 Apple, Inc., Keyboard Hub
         high speed, power 300 mA, config 1, rev 96.15, iSerial 000000000000
         driver: uhub3
addr 06: 05ac:0250 Apple Inc., Apple Keyboard
         low speed, power 20 mA, config 1, rev 0.74
         driver: uhidev1
         driver: uhidev2
addr 07: 046d:c018 Logitech, USB Optical Mouse
         low speed, power 100 mA, config 1, rev 43.01
         driver: uhidev3
addr 08: 0ccd:00b1 TerraTec Electronic GmbH, Aureon 7.1 USB
         full speed, power 500 mA, config 1, rev 0.10
         driver: uaudio0
         driver: ugen0
addr 09: 174c:3074 Asmedia, ASM107x
         super speed, self powered, config 1, rev 1.00, iSerial 123456789ABCDEF
         driver: uhub4
addr 10: 174c:55aa ASMT, ASM105x
         super speed, self powered, config 1, rev 1.00, iSerial 12345679B3D8
         driver: umass0

and here is the mixerctl output (I had tuned the outputs.output down to 127,127
I think:

root@neptune# mixerctl -a
inputs.mix=151,151
inputs.mix_mute=off
inputs.dig-in_mute=off
inputs.record_line-in=151,151
inputs.record_line-in_=off
inputs.record_mic_1=151,151
inputs.record_mic_1_mu=off
inputs.mix_line-in_2=194,194
inputs.mix_line-in_2_m=on
inputs.mix_mic_3=194,194
inputs.mix_mic_3_mute=on
outputs.output=127,127
outputs.output_mute=off
record.enable=sysctl


Thanks for any help!
-peter

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