Hi,
ok...it works now...somehow...incompletly...so to say <cough>
My $HOME/.asoundrc looks like this:
# default device
pcm.!default {
type plug
slave.pcm "loop"
}
# output device
pcm.loopout {
type dmix
ipc_key 328211
slave.pcm "hw:Loopback,0,0"
}
# input device
pcm.loopin {
type dsnoop
ipc_key 686592
slave.pcm "hw:Loopback,1,0"
}
# duplex plug device
pcm.loop {
type plug
slave {
pcm {
type asym
playback.pcm "loopout"
capture.pcm "loopin"
}
}
}
When start firefox and play a video, I can here nothing until I do
this at the commandline:
arecord -f cd -D loop | aplay -f cd -D hw:0,0
The same line can be adapted for recording:
arecord -f cd -D loop <filename>.wav
While recording, I can here nothing and vice versa.
It would be nice, if it would be possible, that audio is audible
(that's audio is for :) ) without any actions from my side
(commandline and such) and recording could be done from a device.
That way, screencast software could use this device for recording.
Cheers!
mcc
On 12/27 08:22, tuxic@xxxxxxxxx wrote:
> Hi,
>
> this looks interesting:
> http://www.pogo.org.uk/~mark/trx/streaming-desktop-audio.html
>
> ...but still not the solution.
>
> The alsaloop command works fine...so the redirection works.
>
> But I can't record anything still.
>
> Cheers!
> mcc
>
>
>
> On 12/27 10:47, Robert M. Riches Jr. wrote:
> > (Apologies if you want reply to list without also a direct reply.
> > My mail client has 'reply' and 'Reply' only.)
> >
> > I am also using pure ALSA. After a little web searching a few
> > days ago, I came up with this .asoundrc file that records to a
> > raw file:
> >
> > vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv cut here vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
> > pcm.Intel { type hw; card Intel; }
> > ctl.Intel { type hw; card Intel; }
> > pcm.NVidia { type hw; card NVidia; }
> > ctl.NVidia { type hw; card NVidia; }
> >
> > pcm.rate48000Hz {
> > type rate
> > slave {
> > pcm writeFile # Direct to the plugin which will write to a file
> > format S16_LE
> > # channels 2
> > rate 48000
> > }
> > #route_policy copy
> > }
> >
> > pcm.writeFile {
> > type file
> > slave {
> > pcm "Intel" # Now write to the actual sound card
> > }
> > file "aplay-D_card0-t_raw-f_S16_LE-r48000-c_2.raw"
> > format "raw"
> > }
> >
> > pcm.!default {
> > type plug
> > slave.pcm "rate48000Hz"
> > }
> > ctl.!default ctl.Intel
> > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cut here ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> >
> > Caution: Some web browsers take liberties with how they deal with
> > sound. For example, some years ago, Firefox Hello (video chat)
> > would work only with very specific .asoundrc content.
> >
> > Changing the sample rate may or may not work. With Musescore, I
> > had to use exactly 48000, not 44100.
> >
> > Here are example commands for converting to WAV and then to MP3:
> >
> > Convert it to WAV:
> >
> > sox -r 48k -e signed -b 16 -c 2 \
> > aplay-D_card0-t_raw-f_S16_LE-r48000-c_2.raw \
> > -r 44100 something.wav
> >
> > Crop it as needed.
> >
> > Optional: Convert it to MP3:
> >
> > ffmpeg -i something.wav something.mp3
> >
> > HTH
> >
> > Robert
> >
> >
> >
> > > Date: Sun, 27 Dec 2020 10:25:14 +0100
> > > From: tuxic@xxxxxxxxx
> > > To: alsa-user@xxxxxxxxxxxxxxxxxxxxx
> > >
> > > Hi,
> > >
> > > I want to record the audio of a live stream video (youtube).
> > >
> > > Everything I tried resulted in audio files with constant or
> > > intermitted sine wave like sounds.
> > >
> > > I am using pure alsa. I don't want pulseaudio and with jack
> > > started firefoxs audio does not work.
> > >
> > > How can I accomplish this recording task successfully ?
> > >
> > > My setup:
> > >
> > > GENTOO Linux
> > > External USB audio DAC (FIIO Olympus 2)
> > >
> > > No $HOME/.asoundrc
> > > /etc/conf.d/alsasound:
> > >
> > > # RESTORE_ON_START:
> > > # Do you want to restore your mixer settings? If not, your cards will be
> > > # muted.
> > > # no - Do not restore state
> > > # yes - Restore state
> > >
> > > RESTORE_ON_START="yes"
> > >
> > > # SAVE_ON_STOP:
> > > # Do you want to save changes made to your mixer volumes when alsasound
> > > # stops?
> > > # no - Do not save state
> > > # yes - Save state
> > >
> > > SAVE_ON_STOP="yes"
> > >
> > > arecord -l:
> > >
> > > **** List of CAPTURE Hardware Devices ****
> > > card 0: Audio [DigiHug USB Audio], device 0: USB Audio [USB Audio]
> > > Subdevices: 1/1
> > > Subdevice #0: subdevice #0
> > >
> > >
> > > arecord -L:
> > > null
> > > Discard all samples (playback) or generate zero samples (capture)
> > > default
> > > Default Audio Device
> > > sysdefault
> > > Default Audio Device
> > > lavrate
> > > Rate Converter Plugin Using Libav/FFmpeg Library
> > > upmix
> > > Plugin for channel upmix (4,6,8)
> > > vdownmix
> > > Plugin for channel downmix (stereo) with a simple spacialization
> > > default:CARD=Audio
> > > DigiHug USB Audio, USB Audio
> > > Default Audio Device
> > > sysdefault:CARD=Audio
> > > DigiHug USB Audio, USB Audio
> > > Default Audio Device
> > > front:CARD=Audio,DEV=0
> > > DigiHug USB Audio, USB Audio
> > > Front output / input
> > > usbstream:CARD=Audio
> > > DigiHug USB Audio
> > > USB Stream Output
> > >
> > > aplay -l:
> > > **** List of PLAYBACK Hardware Devices ****
> > > card 0: Audio [DigiHug USB Audio], device 0: USB Audio [USB Audio]
> > > Subdevices: 1/1
> > > Subdevice #0: subdevice #0
> > > card 0: Audio [DigiHug USB Audio], device 1: USB Audio [USB Audio #1]
> > > Subdevices: 1/1
> > > Subdevice #0: subdevice #0
> > >
> > > lsusb -v (excerpt):
> > >
> > > Bus 005 Device 002: ID 1852:7022 GYROCOM C&C Co., LTD Fiio E10
> > > Device Descriptor:
> > > bLength 18
> > > bDescriptorType 1
> > > bcdUSB 1.10
> > > bDeviceClass 0
> > > bDeviceSubClass 0
> > > bDeviceProtocol 0
> > > bMaxPacketSize0 8
> > > idVendor 0x1852 GYROCOM C&C Co., LTD
> > > idProduct 0x7022 Fiio E10
> > > bcdDevice 0.01
> > > iManufacturer 1 FiiO
> > > iProduct 2 DigiHug USB Audio
> > > iSerial 0
> > > bNumConfigurations 1
> > > Configuration Descriptor:
> > > bLength 9
> > > bDescriptorType 2
> > > wTotalLength 0x0182
> > > bNumInterfaces 4
> > > bConfigurationValue 1
> > > iConfiguration 0
> > > bmAttributes 0x80
> > > (Bus Powered)
> > > MaxPower 500mA
> > > Interface Descriptor:
> > > bLength 9
> > > bDescriptorType 4
> > > bInterfaceNumber 0
> > > bAlternateSetting 0
> > > bNumEndpoints 1
> > > bInterfaceClass 3 Human Interface Device
> > > bInterfaceSubClass 0
> > > bInterfaceProtocol 0
> > > iInterface 0
> > > HID Device Descriptor:
> > > bLength 9
> > > bDescriptorType 33
> > > bcdHID 1.00
> > > bCountryCode 0 Not supported
> > > bNumDescriptors 1
> > > bDescriptorType 34 Report
> > > wDescriptorLength 58
> > > Report Descriptors:
> > > ** UNAVAILABLE **
> > > Endpoint Descriptor:
> > > bLength 7
> > > bDescriptorType 5
> > > bEndpointAddress 0x81 EP 1 IN
> > > bmAttributes 3
> > > Transfer Type Interrupt
> > > Synch Type None
> > > Usage Type Data
> > > wMaxPacketSize 0x0012 1x 18 bytes
> > > bInterval 32
> > > Interface Descriptor:
> > > bLength 9
> > > bDescriptorType 4
> > > bInterfaceNumber 1
> > > bAlternateSetting 0
> > > bNumEndpoints 0
> > > bInterfaceClass 1 Audio
> > > bInterfaceSubClass 1 Control Device
> > > bInterfaceProtocol 0
> > > iInterface 3 FiiO USB DAC-E10
> > > AudioControl Interface Descriptor:
> > > bLength 10
> > > bDescriptorType 36
> > > bDescriptorSubtype 1 (HEADER)
> > > bcdADC 1.00
> > > wTotalLength 0x003e
> > > bInCollection 2
> > > baInterfaceNr(0) 2
> > > baInterfaceNr(1) 3
> > > AudioControl Interface Descriptor:
> > > bLength 12
> > > bDescriptorType 36
> > > bDescriptorSubtype 2 (INPUT_TERMINAL)
> > > bTerminalID 5
> > > wTerminalType 0x0605 SPDIF interface
> > > bAssocTerminal 0
> > > bNrChannels 2
> > > wChannelConfig 0x0003
> > > Left Front (L)
> > > Right Front (R)
> > > iChannelNames 0
> > > iTerminal 0
> > > AudioControl Interface Descriptor:
> > > bLength 12
> > > bDescriptorType 36
> > > bDescriptorSubtype 2 (INPUT_TERMINAL)
> > > bTerminalID 9
> > > wTerminalType 0x0101 USB Streaming
> > > bAssocTerminal 0
> > > bNrChannels 2
> > > wChannelConfig 0x0003
> > > Left Front (L)
> > > Right Front (R)
> > > iChannelNames 0
> > > iTerminal 0
> > > AudioControl Interface Descriptor:
> > > bLength 9
> > > bDescriptorType 36
> > > bDescriptorSubtype 3 (OUTPUT_TERMINAL)
> > > bTerminalID 3
> > > wTerminalType 0x0605 SPDIF interface
> > > bAssocTerminal 0
> > > bSourceID 16
> > > iTerminal 0
> > > AudioControl Interface Descriptor:
> > > bLength 9
> > > bDescriptorType 36
> > > bDescriptorSubtype 3 (OUTPUT_TERMINAL)
> > > bTerminalID 7
> > > wTerminalType 0x0101 USB Streaming
> > > bAssocTerminal 0
> > > bSourceID 5
> > > iTerminal 0
> > > AudioControl Interface Descriptor:
> > > bLength 10
> > > bDescriptorType 36
> > > bDescriptorSubtype 6 (FEATURE_UNIT)
> > > bUnitID 16
> > > bSourceID 9
> > > bControlSize 1
> > > bmaControls(0) 0x01
> > > Mute Control
> > > bmaControls(1) 0x02
> > > Volume Control
> > > bmaControls(2) 0x02
> > > Volume Control
> > > iFeature 0
> > > Interface Descriptor:
> > > bLength 9
> > > bDescriptorType 4
> > > bInterfaceNumber 2
> > > bAlternateSetting 0
> > > bNumEndpoints 0
> > > bInterfaceClass 1 Audio
> > > bInterfaceSubClass 2 Streaming
> > > bInterfaceProtocol 0
> > > iInterface 0
> > > Interface Descriptor:
> > > bLength 9
> > > bDescriptorType 4
> > > bInterfaceNumber 2
> > > bAlternateSetting 1
> > > bNumEndpoints 1
> > > bInterfaceClass 1 Audio
> > > bInterfaceSubClass 2 Streaming
> > > bInterfaceProtocol 0
> > > iInterface 0
> > > AudioStreaming Interface Descriptor:
> > > bLength 7
> > > bDescriptorType 36
> > > bDescriptorSubtype 1 (AS_GENERAL)
> > > bTerminalLink 7
> > > bDelay 0 frames
> > > wFormatTag 0x0001 PCM
> > > AudioStreaming Interface Descriptor:
> > > bLength 26
> > > bDescriptorType 36
> > > bDescriptorSubtype 2 (FORMAT_TYPE)
> > > bFormatType 1 (FORMAT_TYPE_I)
> > > bNrChannels 2
> > > bSubframeSize 2
> > > bBitResolution 16
> > > bSamFreqType 6 Discrete
> > > tSamFreq[ 0] 8000
> > > tSamFreq[ 1] 16000
> > > tSamFreq[ 2] 32000
> > > tSamFreq[ 3] 44100
> > > tSamFreq[ 4] 48000
> > > tSamFreq[ 5] 96000
> > > Endpoint Descriptor:
> > > bLength 9
> > > bDescriptorType 5
> > > bEndpointAddress 0x82 EP 2 IN
> > > bmAttributes 9
> > > Transfer Type Isochronous
> > > Synch Type Adaptive
> > > Usage Type Data
> > > wMaxPacketSize 0x0184 1x 388 bytes
> > > bInterval 1
> > > bRefresh 0
> > > bSynchAddress 0
> > > AudioStreaming Endpoint Descriptor:
> > > bLength 7
> > > bDescriptorType 37
> > > bDescriptorSubtype 1 (EP_GENERAL)
> > > bmAttributes 0x01
> > > Sampling Frequency
> > > bLockDelayUnits 2 Decoded PCM samples
> > > wLockDelay 0x0002
> > > Interface Descriptor:
> > > bLength 9
> > > bDescriptorType 4
> > > bInterfaceNumber 2
> > > bAlternateSetting 2
> > > bNumEndpoints 1
> > > bInterfaceClass 1 Audio
> > > bInterfaceSubClass 2 Streaming
> > > bInterfaceProtocol 0
> > > iInterface 0
> > > AudioStreaming Interface Descriptor:
> > > bLength 7
> > > bDescriptorType 36
> > > bDescriptorSubtype 1 (AS_GENERAL)
> > > bTerminalLink 7
> > > bDelay 0 frames
> > > wFormatTag 0x0001 PCM
> > > AudioStreaming Interface Descriptor:
> > > bLength 26
> > > bDescriptorType 36
> > > bDescriptorSubtype 2 (FORMAT_TYPE)
> > > bFormatType 1 (FORMAT_TYPE_I)
> > > bNrChannels 2
> > > bSubframeSize 3
> > > bBitResolution 24
> > > bSamFreqType 6 Discrete
> > > tSamFreq[ 0] 8000
> > > tSamFreq[ 1] 16000
> > > tSamFreq[ 2] 32000
> > > tSamFreq[ 3] 44100
> > > tSamFreq[ 4] 48000
> > > tSamFreq[ 5] 96000
> > > Endpoint Descriptor:
> > > bLength 9
> > > bDescriptorType 5
> > > bEndpointAddress 0x82 EP 2 IN
> > > bmAttributes 9
> > > Transfer Type Isochronous
> > > Synch Type Adaptive
> > > Usage Type Data
> > > wMaxPacketSize 0x0246 1x 582 bytes
> > > bInterval 1
> > > bRefresh 0
> > > bSynchAddress 0
> > > AudioStreaming Endpoint Descriptor:
> > > bLength 7
> > > bDescriptorType 37
> > > bDescriptorSubtype 1 (EP_GENERAL)
> > > bmAttributes 0x01
> > > Sampling Frequency
> > > bLockDelayUnits 2 Decoded PCM samples
> > > wLockDelay 0x0002
> > > Interface Descriptor:
> > > bLength 9
> > > bDescriptorType 4
> > > bInterfaceNumber 3
> > > bAlternateSetting 0
> > > bNumEndpoints 0
> > > bInterfaceClass 1 Audio
> > > bInterfaceSubClass 2 Streaming
> > > bInterfaceProtocol 0
> > > iInterface 0
> > > Interface Descriptor:
> > > bLength 9
> > > bDescriptorType 4
> > > bInterfaceNumber 3
> > > bAlternateSetting 1
> > > bNumEndpoints 1
> > > bInterfaceClass 1 Audio
> > > bInterfaceSubClass 2 Streaming
> > > bInterfaceProtocol 0
> > > iInterface 0
> > > AudioStreaming Interface Descriptor:
> > > bLength 7
> > > bDescriptorType 36
> > > bDescriptorSubtype 1 (AS_GENERAL)
> > > bTerminalLink 9
> > > bDelay 0 frames
> > > wFormatTag 0x0001 PCM
> > > AudioStreaming Interface Descriptor:
> > > bLength 20
> > > bDescriptorType 36
> > > bDescriptorSubtype 2 (FORMAT_TYPE)
> > > bFormatType 1 (FORMAT_TYPE_I)
> > > bNrChannels 2
> > > bSubframeSize 2
> > > bBitResolution 16
> > > bSamFreqType 4 Discrete
> > > tSamFreq[ 0] 32000
> > > tSamFreq[ 1] 44100
> > > tSamFreq[ 2] 48000
> > > tSamFreq[ 3] 96000
> > > Endpoint Descriptor:
> > > bLength 9
> > > bDescriptorType 5
> > > bEndpointAddress 0x03 EP 3 OUT
> > > bmAttributes 9
> > > Transfer Type Isochronous
> > > Synch Type Adaptive
> > > Usage Type Data
> > > wMaxPacketSize 0x0184 1x 388 bytes
> > > bInterval 1
> > > bRefresh 0
> > > bSynchAddress 0
> > > AudioStreaming Endpoint Descriptor:
> > > bLength 7
> > > bDescriptorType 37
> > > bDescriptorSubtype 1 (EP_GENERAL)
> > > bmAttributes 0x01
> > > Sampling Frequency
> > > bLockDelayUnits 2 Decoded PCM samples
> > > wLockDelay 0x0002
> > > Interface Descriptor:
> > > bLength 9
> > > bDescriptorType 4
> > > bInterfaceNumber 3
> > > bAlternateSetting 2
> > > bNumEndpoints 1
> > > bInterfaceClass 1 Audio
> > > bInterfaceSubClass 2 Streaming
> > > bInterfaceProtocol 0
> > > iInterface 0
> > > AudioStreaming Interface Descriptor:
> > > bLength 7
> > > bDescriptorType 36
> > > bDescriptorSubtype 1 (AS_GENERAL)
> > > bTerminalLink 9
> > > bDelay 0 frames
> > > wFormatTag 0x0001 PCM
> > > AudioStreaming Interface Descriptor:
> > > bLength 20
> > > bDescriptorType 36
> > > bDescriptorSubtype 2 (FORMAT_TYPE)
> > > bFormatType 1 (FORMAT_TYPE_I)
> > > bNrChannels 2
> > > bSubframeSize 3
> > > bBitResolution 24
> > > bSamFreqType 4 Discrete
> > > tSamFreq[ 0] 32000
> > > tSamFreq[ 1] 44100
> > > tSamFreq[ 2] 48000
> > > tSamFreq[ 3] 96000
> > > Endpoint Descriptor:
> > > bLength 9
> > > bDescriptorType 5
> > > bEndpointAddress 0x03 EP 3 OUT
> > > bmAttributes 9
> > > Transfer Type Isochronous
> > > Synch Type Adaptive
> > > Usage Type Data
> > > wMaxPacketSize 0x0246 1x 582 bytes
> > > bInterval 1
> > > bRefresh 0
> > > bSynchAddress 0
> > > AudioStreaming Endpoint Descriptor:
> > > bLength 7
> > > bDescriptorType 37
> > > bDescriptorSubtype 1 (EP_GENERAL)
> > > bmAttributes 0x01
> > > Sampling Frequency
> > > bLockDelayUnits 2 Decoded PCM samples
> > > wLockDelay 0x0002
> > > Interface Descriptor:
> > > bLength 9
> > > bDescriptorType 4
> > > bInterfaceNumber 3
> > > bAlternateSetting 3
> > > bNumEndpoints 1
> > > bInterfaceClass 1 Audio
> > > bInterfaceSubClass 2 Streaming
> > > bInterfaceProtocol 0
> > > iInterface 0
> > > AudioStreaming Interface Descriptor:
> > > bLength 7
> > > bDescriptorType 36
> > > bDescriptorSubtype 1 (AS_GENERAL)
> > > bTerminalLink 9
> > > bDelay 0 frames
> > > wFormatTag 0x2001 IEC1937_AC-3
> > > AudioStreaming Interface Descriptor:
> > > bLength 11
> > > bDescriptorType 36
> > > bDescriptorSubtype 2 (FORMAT_TYPE)
> > > bFormatType 3 (FORMAT_TYPE_III)
> > > bNrChannels 2
> > > bSubframeSize 2
> > > bBitResolution 16
> > > bSamFreqType 1 Discrete
> > > tSamFreq[ 0] 48000
> > > Endpoint Descriptor:
> > > bLength 9
> > > bDescriptorType 5
> > > bEndpointAddress 0x03 EP 3 OUT
> > > bmAttributes 9
> > > Transfer Type Isochronous
> > > Synch Type Adaptive
> > > Usage Type Data
> > > wMaxPacketSize 0x00c0 1x 192 bytes
> > > bInterval 1
> > > bRefresh 0
> > > bSynchAddress 0
> > > AudioStreaming Endpoint Descriptor:
> > > bLength 7
> > > bDescriptorType 37
> > > bDescriptorSubtype 1 (EP_GENERAL)
> > > bmAttributes 0x01
> > > Sampling Frequency
> > > bLockDelayUnits 2 Decoded PCM samples
> > > wLockDelay 0x0002
> > > Device Status: 0x0000
> > > (Bus Powered)
> > >
> > >
> > >
> > > Cheers!
> > > mcc
> > >
> > >
> > > _______________________________________________
> > > Alsa-user mailing list
> > > Alsa-user@xxxxxxxxxxxxxxxxxxxxx
> > > https://lists.sourceforge.net/lists/listinfo/alsa-user
> >
>
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