topic Re: [8MPlus][EVK][ASRC] Detect underrun at 176.4kHz～384kHz in i.MX Processors

[8MPlus][EVK][ASRC] Detect underrun at 176.4kHz～384kHz

masahiro_inamur — Tue, 05 Jul 2022 03:08:42 GMT

Dear @shigenobukatagi san,
cc @wataken san

We are investigating ASRC on 8MPlus EVK with L5.15.5_1.0.0_MX8MP kernel source.
During this investigation, we detected some "underrun" at 176.4kHz～384kHz@16bit by using the following command.

Could you provide some countermeasure for it?

■FW
L5.15.5_1.0.0_MX8MP
https://www.nxp.com/design/development-boards/i-mx-evaluation-and-development-boards/evaluation-kit-for-the-i-mx-8m-plus-applications-processor:8MPLUSLPD4-EVK

■Command (Sound card)

card 4: wm8960audio [wm8960-audio], device 0: HiFi wm8960-hifi-0 [HiFi wm8960-hifi-0]

Best Regards,
Inamura

Re: [8MPlus][EVK][ASRC] Detect underrun at 176.4kHz～384kHz

shigenobukatagi — Tue, 05 Jul 2022 05:06:50 GMT

@atsushihonda san,

Can you please look at the issue?

Best Regards,
Shigenobu

Re: [8MPlus][EVK][ASRC] Detect underrun at 176.4kHz～384kHz

atsushihonda — Tue, 05 Jul 2022 08:03:52 GMT

Hi @masahiro_inamur san, @wataken san

It seems that the command is not seen. Could you please send the command that shows underrun?

@shigenobukatagi

Best regards,
Atsushi Honda

Re: [8MPlus][EVK][ASRC] Detect underrun at 176.4kHz～384kHz

masahiro_inamur — Tue, 05 Jul 2022 09:20:58 GMT

Hi, @atsushihonda san,

Sorry for confusing you.

We use the following aplay command.

root@imx8mpevk:~# aplay -l **** List of PLAYBACK Hardware Devices **** card 0: btscoaudio [bt-sco-audio], device 0: 30c20000.sai-bt-sco-pcm-wb bt-sco-pcm-wb-0 [30c20000.sai-bt-sco-pcm-wb bt-sco-pcm-wb-0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 2: imxaudioxcvr [imx-audio-xcvr], device 0: XCVR PCM snd-soc-dummy-dai-0 [XCVR PCM snd-soc-dummy-dai-0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 3: audiohdmi [audio-hdmi], device 0: i.MX HDMI i2s-hifi-0 [i.MX HDMI i2s-hifi-0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 4: wm8960audio [wm8960-audio], device 0: HiFi wm8960-hifi-0 [HiFi wm8960-hifi-0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 4: wm8960audio [wm8960-audio], device 1: HiFi-ASRC-FE (*) [] Subdevices: 1/1 Subdevice #0: subdevice #0

aplay -D hw:4,1 xxx.wav

Best Regards,
Inamura

Re: [8MPlus][EVK][ASRC] Detect underrun at 176.4kHz～384kHz

atsushihonda — Wed, 06 Jul 2022 00:42:49 GMT

Hi @masahiro_inamur san,

Thanks for your information.

We just noticed that it is better to communicate this in your private audio community site, instead of here.
Could you please open another ticket in your private audio community site?

Best regards,
Atsushi Honda

Re: [8MPlus][EVK][ASRC] Detect underrun at 176.4kHz～384kHz

masahiro_inamur — Thu, 07 Jul 2022 04:26:43 GMT

Hi, @atsushihonda san,

Noted on this.
I will open another ticket in audio community site.

Best regards,
Inamura