|22nd August 2013, 06:30 PM||#11|
So, unless you are using a portable player (because some have tone controls/eq/bass boost etc) then the line and headphone feeds have no equalisation as such. Whatever level you set to record at with Audacity will give the same playback level at any frequency you choose from around 5Hz to 20kHz.
A simple opamp buffer with a preset pot at the input is all that is needed. For 1 volt output the opamp would comfortably run on a single 9 volt supply. 2 volts rms is around 5.6 volts peak to peak, still do-able on a 9 volt supply with the right opamp. To get higher levels would need a higher supply voltage.
Installing and using LTspice IV. From beginner to advanced.
Help for Ruth & Dave
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