안녕하세요
v210 보드에서 GPE 파일 시스템으로 여러가지 공부하고 있습니다.
그런데 arecord 로 녹음 해보니 묵음만 나오고 있습니다.
aplay 로 제가 만든 wave 포맷 데이터를 재생해 봤는데 그건 잘 나오고 있습니다.
audio in 으로 녹음 하는 방법을 알 수 있을까요???
다음과 같이 실행해 보았습니다.
root@S5PC1xx:~/alsa_test# arecord -d 5 save.pcm
Recording WAVE 'save.pcm' : Unsigned 8 bit, Rate 8000 Hz, Mono
s200_hifi_hw_params: rate-8000
SRC_CLK=32768000 PSR=7 RFS=512 BFS=32
root@S5PC1xx:~/alsa_test#
root@S5PC1xx:~/alsa_test# aplay save_NF_ON_MAX.pcm
Playing WAVE 'save_NF_ON_MAX.pcm' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
s200_hifi_hw_params: rate-44100
SRC_CLK=45158400 PSR=3 RFS=256 BFS=32
root@S5PC1xx:~/alsa_test#
root@S5PC1xx:~/alsa_test# amixer
Simple mixer control 'Headphone',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 31
Front Left: 10 [32%]
Front Right: 10 [32%]
Simple mixer control 'Headphone Mute',0
Capabilities: enum
Items: 'Disable' 'Enable'
Item0: 'Disable'
Simple mixer control 'Mic1 Gain',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 31
Mono: 11 [35%]
Simple mixer control 'Mic1 PreAmp',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 3
Mono: 2 [67%]
Simple mixer control 'Mic2 Gain',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 31
Mono: 31 [100%]
Simple mixer control 'Mic2 PreAmp',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 3
Mono: 0 [0%]
Simple mixer control 'Playback Path',0
Capabilities: enum
Items: '00' '10' '21' '22' '23' '30' '40' '50' '60'
Item0: '00'
Simple mixer control 'ADC Filter',0
Capabilities: enum
Items: 'Disable' '258-16' '500-16' '258-8' '500-8' 'Fs/240'
Item0: 'Disable'
Simple mixer control 'AVL',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 15
Mono: 15 [100%]
Simple mixer control 'AVLG',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 3
Mono: 3 [100%]
Simple mixer control 'AVR',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 15
Mono: 10 [67%]
Simple mixer control 'AVRG',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 3
Mono: 2 [67%]
Simple mixer control 'Biquad',0
Capabilities: enum
Items: 'a' 'b' 'c'
Item0: 'a'
Simple mixer control 'DAC Filter',0
Capabilities: enum
Items: 'Disable' '258-16' '500-16' '258-8' '500-8' 'Fs/240'
Item0: 'Disable'
Simple mixer control 'DC Block DAI2',0
Capabilities: enum
Items: 'Disable' 'Enable'
Item0: 'Disable'
Simple mixer control 'Equalizer',0
Capabilities: enum
Items: 'voice' 'music' 'flat' 'treble reduce' 'loudness'
Item0: 'flat'
Simple mixer control 'Filter Mode',0
Capabilities: enum
Items: 'Voice' 'Music'
Item0: 'Voice'
Simple mixer control 'High Pass Threshold',0
Capabilities: enum
Items: '0.6' '1.2' '1.8' '2.4' '3.2' '4.0' '4.8' '00'
Item0: '0.6'
Simple mixer control 'Lower Corner',0
Capabilities: enum
Items: 'Fixed' 'Dynamic 0Hz' 'Dynamic 400Hz' 'User'
Item0: 'Fixed'
Simple mixer control 'PGAINA',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 7
Mono: 4 [57%]
Simple mixer control 'PGAINB',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 7
Mono: 7 [100%]
Simple mixer control 'Receiver',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 31
Mono: 31 [100%]
Simple mixer control 'Receiver Mute',0
Capabilities: enum
Items: 'Disable' 'Enable'
Item0: 'Disable'
Simple mixer control 'Sample Rate DAI1',0
Capabilities: enum
Items: '>50kHz' '<50kHz'
Item0: '>50kHz'
Simple mixer control 'Sample Rate DAI2',0
Capabilities: enum
Items: '>50kHz' '<50kHz'
Item0: '>50kHz'
Simple mixer control 'Speaker',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 31
Front Left: 18 [58%]
Front Right: 18 [58%]
Simple mixer control 'Speaker Mute',0
Capabilities: enum
Items: 'Disable' 'Enable'
Item0: 'Disable'
Simple mixer control 'Upper Corner',0
Capabilities: enum
Items: 'Disable' '400Hz' '600Hz' '800Hz' '1000Hz'
Item0: 'Disable'
root@S5PC1xx:~/alsa_test#
그럼 날씨도 추운데 감기 조심하세요 ^^;;;