ICH5 / AC'97 i mikrofon
Z funus.net
Wraz z jądrem Linuksa w wersji 2.6.21 zaszły pewne zmiany w podsystemie obsługi dźwięku ALSA, wskutek których przestało działać nagrywanie dźwięku z mikrofonu. Okazało się, że to tylko kwestia ustawień.
W konfiguracji, gdzie głośniki podłączone są do zielonego gniazda z tyłu a mikrofon – do czerwonego, pomogło włączenie następujących opcji w mikserze:
- oczywiście trzeba zaznaczyć mikrofon (Mic) jako źródło dźwięku do nagrywania; położenie suwaka głośności nie ma znaczenia;
- to samo zrobić z urządzeniem oznaczonym jako Capture;
- przełącznik Surrond Jack Mode ustawić na wartość Shared;
- Channel Mode na 2ch (działa też 4ch, ale 6ch już nie);
- przełącznik V_REFOUT może przyjmować wartości: High-Z, 0 V, 2.25 V, 3.7 V; mikrofon działa tylko z dwiema ostatnimi.
Ilustracje przedstawiają zrzuty ekranu programu kmix, a poniżej znajduje się wyjście polecenia amixer przy działającym mikrofonie (jądro 2.6.22.14):
Simple mixer control 'Master',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Front Left: Playback 16 [52%] [-22.50dB] [on] Front Right: Playback 16 [52%] [-22.50dB] [on] Simple mixer control 'Master Mono',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback 0 - 31 Mono: Playback 28 [90%] [-4.50dB] [on] Simple mixer control 'Master Surround',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Front Left: Playback 0 [0%] [-46.50dB] [on] Front Right: Playback 0 [0%] [-46.50dB] [on] Simple mixer control 'Headphone Jack Sense',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'PCM',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Front Left: Playback 24 [77%] [1.50dB] [on] Front Right: Playback 24 [77%] [1.50dB] [on] Simple mixer control 'Surround',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Front Left: Playback 0 [0%] [-46.50dB] [on] Front Right: Playback 0 [0%] [-46.50dB] [on] Simple mixer control 'Surround Jack Mode',0 Capabilities: enum Items: 'Shared' 'Independent' Item0: 'Shared' Simple mixer control 'Center',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback 0 - 31 Mono: Playback 25 [81%] [-9.00dB] [on] Simple mixer control 'LFE',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback 0 - 31 Mono: Playback 25 [81%] [-9.00dB] [on] Simple mixer control 'Line',0 Capabilities: pvolume pswitch cswitch cswitch-exclusive Capture exclusive group: 0 Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: Playback 0 - 31 Front Left: Playback 28 [90%] [7.50dB] [on] Capture [off] Front Right: Playback 28 [90%] [7.50dB] [on] Capture [off] Simple mixer control 'Line Jack Sense',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [on] Simple mixer control 'CD',0 Capabilities: pvolume pswitch cswitch cswitch-exclusive Capture exclusive group: 0 Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: Playback 0 - 31 Front Left: Playback 31 [100%] [12.00dB] [on] Capture [off] Front Right: Playback 31 [100%] [12.00dB] [on] Capture [off] Simple mixer control 'Mic',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch cswitch-exclusive Capture exclusive group: 0 Playback channels: Mono Capture channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Playback 0 [0%] [-34.50dB] [on] Front Left: Capture [on] Front Right: Capture [on] Simple mixer control 'Mic Boost (+20dB)',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [on] Simple mixer control 'Mic Select',0 Capabilities: enum Items: 'Mic1' 'Mic2' Item0: 'Mic1' Simple mixer control 'Video',0 Capabilities: cswitch cswitch-exclusive Capture exclusive group: 0 Capture channels: Front Left - Front Right Front Left: Capture [off] Front Right: Capture [off] Simple mixer control 'Phone',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch cswitch-exclusive Capture exclusive group: 0 Playback channels: Mono Capture channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Playback 19 [61%] [-6.00dB] [on] Front Left: Capture [off] Front Right: Capture [off] Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [on] Simple mixer control 'IEC958 Playback AC97-SPSA',0 Capabilities: volume volume-joined Playback channels: Mono Capture channels: Mono Limits: 0 - 3 Mono: 0 [0%] Simple mixer control 'IEC958 Playback Source',0 Capabilities: enum Items: 'AC-Link' 'A/D Converter' Item0: 'AC-Link' Simple mixer control 'PC Speaker',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback 0 - 15 Mono: Playback 6 [40%] [-27.00dB] [on] Simple mixer control 'Aux',0 Capabilities: pvolume pswitch cswitch cswitch-exclusive Capture exclusive group: 0 Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: Playback 0 - 31 Front Left: Playback 19 [61%] [-6.00dB] [on] Capture [off] Front Right: Playback 19 [61%] [-6.00dB] [on] Capture [off] Simple mixer control 'Mono Output Select',0 Capabilities: enum Items: 'Mix' 'Mic' Item0: 'Mix' Simple mixer control 'Capture',0 Capabilities: cvolume cswitch Capture channels: Front Left - Front Right Limits: Capture 0 - 15 Front Left: Capture 11 [73%] [16.50dB] [on] Front Right: Capture 11 [73%] [16.50dB] [on] Simple mixer control 'Mix',0 Capabilities: cswitch cswitch-exclusive Capture exclusive group: 0 Capture channels: Front Left - Front Right Front Left: Capture [off] Front Right: Capture [off] Simple mixer control 'Mix Mono',0 Capabilities: cswitch cswitch-exclusive Capture exclusive group: 0 Capture channels: Front Left - Front Right Front Left: Capture [off] Front Right: Capture [off] Simple mixer control 'Channel Mode',0 Capabilities: enum Items: '2ch' '4ch' '6ch' Item0: '2ch' Simple mixer control 'Downmix',0 Capabilities: enum Items: 'Off' '6 -> 4' '6 -> 2' Item0: 'Off' Simple mixer control 'Exchange Center/LFE',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'Exchange Front/Surround',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'External Amplifier',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [on] Simple mixer control 'High Pass Filter Enable',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'Spread Front to Surround and Center/LFE',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'Stereo Mic',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'V_REFOUT',0 Capabilities: enum Items: 'High-Z' '3.7 V' '2.25 V' '0 V' Item0: '2.25 V'
