four channels measurements

[oliver]

Hi John,
Do you think it would be possible to have REW perform a simultaneous measurement on four channels, so as to measure the SPL and impedance of the connected driver at the same time, thus avoiding having to switch inputs and perform two measurements each time? Perhaps as an option for the paid version.

Thank you,

Oliver

 

[John Mulcahy]

In principle that may be possible with one extra channel for the mic input (so 3 input channels in total). The impedance measurement input provides access to the signal at the driver terminals so it should be possible to derive an SPL impulse response from that and the mic capture. It would require other internal changes to the way inputs are treated, however, so it is something I can add to the todo list for future consideration.

 

[oliver]

Thanks so much John, that would be really great and really helpful.
Oliver

 

[oliver]

Sorry, John,
I'll take this opportunity to ask another question: is there a way to save calibration presets for the microphone, which can be recalled as needed? I use an ear simulator with different test fixtures, so I have to recalibrate each time depending on the configuration used.
Thank you,
Oliver.