SynthMaker

Audio Select extra parameters

Archive · 2011 2 old posts

From the original SynthMaker forum (2004–2014), with its members’ names and dates.

trogluddite ·

Being the oddball that I am, I have a few projects that are more like stand alone app's that the usual Synth/Sampler/Effect plugins. I'd really like to make some nice I/O routing windows to make using .exe's easier on soundcards that have lots of I/O (I bang my head every time every I go under my desk to re-patch cables!!) - and I'd also like to include driver latency compensation into a couple of schematics.

The new primitives for selecting drivers, setting SR, opening ASIO dialogue etc. are a great step in the right direction, which would be rounded of nicely with access to more detailed info from the selected driver - just 4 extra integer outputs for Input Latency, Output Latency, Number of Inputs and Number of Outputs from the ASIOsettings (or maybe AudioSelect) primitive would give everything needed for a lovely "Audio Settings" page.

In the meantime, I know that using a loopback cable, I can find out the true 'round trip' latency for a system using an audio 'Ping' and some correlation - I'm working on a little schematic to do this. But is there any empirical way that I can determine how much is input latency and how much is output latency? I know that for some soundcards, the two figures are not always the same, so can't always rely on just dividing the round-trip figure in half - but I can't see a logical way to seperate the two.

DigitalWhiteByte ·

trogluddite wrote: But is there any empirical way that I can determine how much is input latency and how much is output latency?

An empirical way is to register him / herself. Send to a sound output and record his return from an input, by starting recording at the same time you run the play, the silence in the head of the recorded sample is the total latency between input and output.

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