Observing on Focal 20.04 on ROG STRIX X470-I, same ALC1220 audio device.
Its intermittent, sometimes audacity will record properly. Sometimes it
will record slow and playback fast.
its not just audacity, e.g. chrome observes same affect
(https://mictests.com/)
bumped kernel to 5.7.6-050706-generic from mainline, same affect
alsa-base 1.0.25+dfsg-0ubuntu5, pulseaudio 1:13.99.1-1ubuntu3.3
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https://bugs.launchpad.net/bugs/1764965
Title:
[Realtek ALC1220 ASUS PRIME X370] Recording is very slow and plays 10x
faster
Status in sound-2.6 (alsa-kernel):
New
Status in alsa-driver package in Ubuntu:
Confirmed
Bug description:
Recording applications (audacity, arecord, gnome-sound-recorder)
record extremely slowly (at what seems to be 0,1x speed), which means
that at playback the sound is played at a very high pitch and much
faster than the original.
To help you understand the issue, I've attached an archive containing two
files recorded at the same time, one with arecord -f cd and the other with a
stand-alone Olympus recorder.
A video of Audacity's behavior when trying to record is also available:
https://youtu.be/Fe20eQNvZVA
Look at the seconds hand of the xclock and how much it is moving before
Audacity is done recording one second of audio.
Things I've already tried:
* Purging and reinstalling Audacity
* Purging and reinstalling Pulseaudio following the guide on the Ubuntu Wiki
* Running audacity with this command: Exec=env PULSE_LATENCY_MSEC=30
audacity as suggested on AskUbuntu
* Reinstalling Ubuntu on a new hard disk
* Running audacity on a live CD (in Ubuntu version 16.04.3, 17.10.1, 18.04
daily and Xubuntu 17.10.1, 18.04)
The machine is a Ryzen 5 1600 with an ASUS X370 Prime motherboard.
The problem can be reproduced as follows:
* Boot a live DVD of Ubuntu/Xubuntu 16.04.3, 17.10.1, 18.04 (versions I've
tested with)
* Install audacity via the terminal
* Start recording, microphone is connected to the rear microphone jack.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.13.0-38.43~16.04.1-generic 4.13.16
Uname: Linux 4.13.0-38-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.16
Architecture: amd64
AudioDevicesInUse:
USERPID ACCESS COMMAND
/dev/snd/controlC1: jacopo 2417 F pulseaudio
/dev/snd/controlC0: jacopo 2417 F pulseaudio
CurrentDesktop: Unity
Date: Wed Apr 18 09:35:50 2018
InstallationDate: Installed on 2018-03-03 (45 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64
(20170801)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:Generic failed
Symptom_Card: HD-Audio Generic - HD-Audio Generic
Symptom_Jack: Pink Mic, Rear
Symptom_Type: None of the above
Title: [System Product Name, Realtek ALC1220, Pink Mic, Rear] Recording
problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/06/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3805
dmi.board.asset.tag: Default string
dmi.board.name: PRIME X370-PRO
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr3805:bd03/06/2018:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnPRIMEX370-PRO:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
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