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I have an old Iphone who's only job in life now is as a signal generator,

I make Wav test tone files in Reaper with phase reversed L/R to form a balanced signal ,

I can precisely adjust the level to +4 with the multimeter .

Needless to say all services and communications with the Apple mothership are terminated ,

Easy to carry alongside the multimeter in the pouch , gives a very stable repeatable output signal with no chance of ground loops .


Neat idea to use drum samples to check gear is working .


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