Hardware Gba Sp headphone jack

[Liriel]

How muß the wiring of the headphone jack be on the gba Sp that the speaker goes of?
I build at the Moment a case for the gba sp in normal handheld (like GB and gbc) Look.
I want to Use a USB c for Headphone jack and charge instead of the normal Port.
But how works the Adapter with the headphone jack?

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[FAST6191]

Like most technical questions about the GBA it is happily answered by GBAtek
http://problemkaputt.de/gbatek.htm#auxsoundheadphonesocketandbatterypowersupply

 

[Liriel]

Thx for the Page.
I too of the Adapter after Read it and i Have a bridge between GND and the speaker off pin.

I think i can adapt it to charge and Audio at the Same time over usb typ c

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