Unknown user в 08:13, 15 октября 2014

2014-10-15T08:13:04Z

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Настройка микрофона описана тут:
http://ac100.grandou.net/mixer_settings#recording_sound_from_integrated_dmic

===Утсарело (outdated)===
<pre>
<marvin24_DT> stuw__, I disassabled the webcam
<marvin24_DT> there is clearly a mic there
</pre>

<pre>
On 12/10/2011 10:09 AM, Leon Romanovsky wrote:
> Hi All,
> We are trying to understand, if internal microphone is available in AC100.
>
> According to specifications, there is internal microphone:
> Specifications:
> AndroidTM 2.1 NVIDIA® TegraTM 250 Mobile Processor (1GH, ARM) RAM: 512
> MB DDR2 (333 MHz) 8GB flash storage (NAND) 25.7cm (10.1”) TruBrite®
> display with LED backlight, 1,024 x 600 pixels Bluetooth 2.1 +EDR*,
> WLAN (802.11 b/g/n), Mobile Broadband 1 x USB 2.0, 1x Mini USB, Card
> Reader (SD, MMC), Audio out/Mic in combo socket, HDMI® 1.3 MP webcam
> with integrated microphone Location based switchable desktop Toshiba
> Home Menu, a customisable desktop with widgets and shortcuts Size:
> 262mm x 190mm x 14 / 21mm Weight: starting at 870g
>
> According to schematics, the internal microphone is not connected:
> http://www.go-gddq.com/upload/2011-07/11072617361523.pdf
>
> Did anyone use internal microphone under android?
Internal mics are often digital (DMIC) rather than analog; you could try
that out. It's possible that you'd also need to turn on a voltage
regulator to use it; some of our reference boards work that way (same
regulator as for the webcam in our case)
</pre>

http://julkinen.salaliitto.com/ac100/logs/ac100.41.txt
<pre>
19:12 ogra_ had accidentially an external mic work while playing with alsamixer and the phone headset plugged in
19:12 >>> e-ndy!~jkastner@static-84-242-102-36.net.upcbroadband.cz
19:12 < ogra_> but never the internal one
</pre>
<pre>
[20:45:05] <gildean> yes, it's a four-headed minijack
[20:45:48] <gildean> the first part of the plug is mic+ the second is hpr+ then hpl+ and last the ground
[20:47:00] <gildean> so both the normal headphone plug and the longer headset-plug work but the mic should be activated only with the latter
</pre>

leonro нашел интереснейший патч: http://mailman.alsa-project.org/pipermail/alsa-devel/2009-March/015698.html

Скорее всего надо включать оба итема, перед тем, как пробовать внутренний или внешний микрофон.
<pre>
Simple mixer control 'Left Capture Mix Mic1',0
Capabilities: cswitch cswitch-joined penum
Capture channels: Mono
Mono: Capture [on]
Simple mixer control 'Left Capture Mix Mic2',0
Capabilities: cswitch cswitch-joined penum
Capture channels: Mono
Mono: Capture [off]
</pre>

<pre>
leon@ssd:~$ arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: tegraalc5632 [tegra-alc5632], device 0: ALC5632 PCM alc5632-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
</pre>
<pre>
leon@ssd:~$ arecord -L
default
Playback/recording through the PulseAudio sound server
pulse
Playback/recording through the PulseAudio sound server
dmix:CARD=tegraalc5632,DEV=0
tegra-alc5632,
Direct sample mixing device
dsnoop:CARD=tegraalc5632,DEV=0
tegra-alc5632,
Direct sample snooping device
hw:CARD=tegraalc5632,DEV=0
tegra-alc5632,
Direct hardware device without any conversions
plughw:CARD=tegraalc5632,DEV=0
tegra-alc5632,
Hardware device with all software conversions
leon@ssd:~$
</pre>

Микрофон - История изменений

Unknown user в 08:13, 15 октября 2014