3 ms·
The LA-2A is great compressor. To be clear it uses a different application of "optical coupling" in that Audio is not passing through the optical connection. T
by lebuffon 4y ago
The LA-2A is great compressor. To be clear it uses a different application of "optical coupling" in that Audio is not passing through the optical connection.
The light source is driven by a DC amplifier that generates a control voltage derived from the audio signal. The light shines onto a photo-resistor that is used as the shunt component of an audio pad. (attenuator)
As the light intensity increases the pad reduces the signal level at the pad creating an audio compressor.
- CPLX 4y agoYes this is of course correct and a worthwhile point to make. The fidelity of an actual optical transfer function will never be even close enough to the level needed for the transmission of actual high quality audio.