User Manual
7
Recording an analogue guitar signal using both inputs
In this instance, should you want to record the signals digitally, the stereo output of the optional digital card (if installed) will mirror
the MAIN and DI outputs (left and right respectively).
If recording through a desk or other low-latency environment, a stereo mix with backing tracks and guitar can be sent back to ISA
One’s CUE MIX inputs to allow a latency-free headphones mix for the guitarist (as in diagram ).
If recording to a DAW, a mono backing tracks mix can be sent to ISA One, via the EXT IP (as in diagram ). However, this will make the
second channel of the digital card’s stereo output become the EXT IP signal and not the DI IP, meaning the mic’d and direct guitar
signals must be recorded using the analogue connections shown above.
Specications
Mic Input Response
Gain range = 0dB to 60dB in 0dB steps + 0 dB of variable gain
Input Impedance, variable as follows:-
Switched Impedance setting Equivalent Input Impedance at kHz
Low = 600Ω
ISA0 = 00Ω
Med = 00Ω
High = 6800Ω
EIN (equivalent input noise) = -6dB measured at 60dB of gain with 50Ω terminating impedance and Hz/kHz band-pass lter
Noise at main output with gain at unity (0dB) = -7dBu measured with a Hz/kHz band-pass lter
Signal to noise ratio relative to max headroom (dBu) = 06dB
THD at medium gain (0dB) = 0.000% measured with a kHz -0dBu input signal and with a Hz/kHz band-pass lter
Frequency response at minimum gain (0dB) = -0.5dB down at 0Hz and -dB down at 5kHz
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