Recording Light Solution - Not for the faint of heart.
Hello,
So I like many, wanted a record light driven by sonar.
Now the prerequisites:
I have my studio somewhat outfitted with X10 home automation. (Cheap)
I also DO NOT use sonar's audio metronome, but use a hardware one that we can print on a track too.
So I:
Made a 22khz wave file with Wavelab's create a wave file option. and called it 22khz_key.wav.
The I assigned that wav file to SONAR's audio metronome. This gives a steady tone out a dedicated audio port above the range of hearing.
Set the audio metronome to only be active during record. Now when you are in record mode, you get this tone out of an audio port of your
choosing that you can drive a ducker with (For talkback/monitor gating) and because the tone is above what you can hear, feedthough is not an issue when keying a gate with it.
So what about the record light?
I found an X10 module that responds to audio input. The PF284 takes audio in and activates the x10 devices in your facility that are on its
"address". However, It's input range is 6-18 volts! - This cannot be driven from a line out. So I had to modify it. Here is the schematic of a PF284 front end.
The prescription for increasing it's sensitivity is as follows:
Remove the 3.3k resistor completely.
Put a 100k resistor across the input terminals.
This device will respond now to signals as low as -3db. The wave file I made is odb full scale.
So I address a lamp with this PF284 and trigger it with my metronone audio record key. Now any lamp
attached to a lamp controller at the same address as the PF284 will light during record.
Have fun.
:Ron