It’s much easier than the summing that happens when you PFL a DCA, because the audio doesn’t need to be summed as it would be for a PFL (summing the audio is a more complex function). Only the channel levels need to be added, which are available for all channels at all times (see the meter page). Just simple addition of the numbers that are the AFL levels of the channels, that’s it.
Let’s suppose there are two input channels, both fed a sine wave from the signal generator, and we polarity invert one of them. Now let’s feed them both to an audio group but also set them as members of a DCA.
Q: With the audio group summing the two signals together and measuring the level post sum, what does the group metering say?
Answer: they cancel out, there is no visible signal on the meters.
Q: If you sum the metering data of each of the DCA’s members, what would the “DCA metering” say?
Answer: Each member’s metering data doesn’t take into account its phase or polarity, so the levels will just be blindly added together without respecting coherency, and will behave the same regardless of phase/polarity with respect to each other.
I am a programmer, and integer sums are probably one of the simplest operations a computer can do.
Being a programmer doesn’t qualify you to talk DSP though.. Quid in the post, please.
DC
