Analog wired Headset

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m (Category: -Hardware, (It's in sub 'Audio'))
(Software support: Add Angus' script)
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Dylan proposed a [http://lists.openmoko.org/pipermail/community/2008-September/029599.html proof of concept scripts] to fix something about the headset insertion/removal being incorrectly acted upon.
 
Dylan proposed a [http://lists.openmoko.org/pipermail/community/2008-September/029599.html proof of concept scripts] to fix something about the headset insertion/removal being incorrectly acted upon.
 +
 +
== Related alsa controls ==
 +
 +
Controls affecting bluetooth mic volume for GSM:
 +
Control 13: "Mono Voice Playback Volume"
 +
Control 5: "Mono Playback Volume"
 +
 +
Controls affecting handset earpiece volume for GSM:
 +
Control 6: "Bypass Playback Volume"
 +
Control 4: "Speaker Playback Volume"
 +
 +
Controls affecting wired headset earpiece volume for GSM:
 +
Control 6: "Bypass Playback Volume"
 +
Control 3: "Headphone Playback Volume"
 +
 +
Controls affecting handset mic volume for GSM:
 +
Control 48: "Mic2 Capture Volume"
 +
Control 12: "Mono Sidetone Playback Volume"
 +
Control 5: "Mono Playback Volume"
 +
 +
Controls affecting wired headset mic volume for GSM:
 +
Control 49: "Mic1 Capture Volume"
 +
Control 12: "Mono Sidetone Playback Volume"
 +
Control 5: "Mono Playback Volume"
 +
 +
Controls affecting handset mic volume for GSM:
 +
Control 48: "Mic2 Capture Volume"
 +
Control 12: "Mono Sidetone Playback Volume"
 +
Control 5: "Mono Playback Volume"
 +
 +
Controls affecting wired headset mic volume for GSM:
 +
Control 49: "Mic1 Capture Volume"
 +
Control 12: "Mono Sidetone Playback Volume"
 +
Control 5: "Mono Playback Volume"
 +
 +
== Python mixer to control mic volumes ==
 +
 +
Posted on the Community list Sep 17, 2008; 08:45pm
 +
 +
Angus has written a python mixer to control the mic volumes for the various headsets. The speaker volumes will be added when I trace their path through the wolfson. It'll currently control handset, wired headset and bluetooth volumes. You currently need to tell it which to control as I have not found any dbus signals to tell what alsa state you are currently in. The displayed volumes may be wrong if you start the volume control before the alsa state change. One you use a control to set its volume it will reflect the state of the underlying hardware.
 +
 +
You'll need these 3 files
 +
 +
http://handheldshell.com/python-pyalsaaudio_0.3-ml0_armv4t.ipk
 +
http://handheldshell.com/pymixer.py
 +
http://handheldshell.com/volume.desktop
 +
 +
install pyalsaausdio and pygtk
 +
 +
copy pymxer /usr/bin
 +
copy volume.desktop /usr/share/applications
 +
 +
You can now control mic volume.
 +
 +
Angus Ainslie
 +
  
 
[[Category:Neo1973 Hardware]]
 
[[Category:Neo1973 Hardware]]
 
[[Category:Neo FreeRunner Hardware]]
 
[[Category:Neo FreeRunner Hardware]]
 
[[Category:Audio]]
 
[[Category:Audio]]

Revision as of 15:28, 19 September 2008

There's a four-ring 2.5mm stereo jack which provides connectivity to old-fashioned wired headsets.

The headsets used by Motorola smartphones (A780,A1200, ...) and the V-360 have a compatible configuration.

The headsets used by some Nokia phones (N95, ...) have the same jack but they are incompatible. For technical information about rewiring them visit Analog wired Headset Nokia

Contents

Neo FreeRunner

ring
1(base): GND
2: left out
3: right out
4(tip): mic + HOLD-button(press:short to GND)

Neo 1973

Pinout: [1]

base = ground 
speaker left  (internal impedance 33R) to ground. (+jackinsert detection)
speaker right (internal impedance 33R) to ground.
tip = mic electret condenser type, to ground. 
      bias (power for mic) 2K2 from +3.3v(wolfson codec) 
      (+HoldButton shortcircuit to ground)

Software support

Dylan proposed a proof of concept scripts to fix something about the headset insertion/removal being incorrectly acted upon.

Related alsa controls

Controls affecting bluetooth mic volume for GSM: Control 13: "Mono Voice Playback Volume" Control 5: "Mono Playback Volume"

Controls affecting handset earpiece volume for GSM: Control 6: "Bypass Playback Volume" Control 4: "Speaker Playback Volume"

Controls affecting wired headset earpiece volume for GSM: Control 6: "Bypass Playback Volume" Control 3: "Headphone Playback Volume"

Controls affecting handset mic volume for GSM: Control 48: "Mic2 Capture Volume" Control 12: "Mono Sidetone Playback Volume" Control 5: "Mono Playback Volume"

Controls affecting wired headset mic volume for GSM: Control 49: "Mic1 Capture Volume" Control 12: "Mono Sidetone Playback Volume" Control 5: "Mono Playback Volume"

Controls affecting handset mic volume for GSM: Control 48: "Mic2 Capture Volume" Control 12: "Mono Sidetone Playback Volume" Control 5: "Mono Playback Volume"

Controls affecting wired headset mic volume for GSM: Control 49: "Mic1 Capture Volume" Control 12: "Mono Sidetone Playback Volume" Control 5: "Mono Playback Volume"

Python mixer to control mic volumes

Posted on the Community list Sep 17, 2008; 08:45pm

Angus has written a python mixer to control the mic volumes for the various headsets. The speaker volumes will be added when I trace their path through the wolfson. It'll currently control handset, wired headset and bluetooth volumes. You currently need to tell it which to control as I have not found any dbus signals to tell what alsa state you are currently in. The displayed volumes may be wrong if you start the volume control before the alsa state change. One you use a control to set its volume it will reflect the state of the underlying hardware.

You'll need these 3 files

http://handheldshell.com/python-pyalsaaudio_0.3-ml0_armv4t.ipk
http://handheldshell.com/pymixer.py
http://handheldshell.com/volume.desktop

install pyalsaausdio and pygtk

copy pymxer /usr/bin
copy volume.desktop /usr/share/applications

You can now control mic volume.

Angus Ainslie

Personal tools

There's a four-ring 2.5mm stereo jack which provides connectivity to old-fashioned wired headsets.

The headsets used by Motorola smartphones (A780,A1200, ...) and the V-360 have a compatible configuration.

The headsets used by some Nokia phones (N95, ...) have the same jack but they are incompatible. For technical information about rewiring them visit Analog wired Headset Nokia

Neo FreeRunner

ring
1(base): GND
2: left out
3: right out
4(tip): mic + HOLD-button(press:short to GND)

Neo 1973

Pinout: [1]

base = ground 
speaker left  (internal impedance 33R) to ground. (+jackinsert detection)
speaker right (internal impedance 33R) to ground.
tip = mic electret condenser type, to ground. 
      bias (power for mic) 2K2 from +3.3v(wolfson codec) 
      (+HoldButton shortcircuit to ground)

Software support

Dylan proposed a proof of concept scripts to fix something about the headset insertion/removal being incorrectly acted upon.