[6.64 macOS-arm64] 55/20 ms latency readout with built in IO MBP 16" M1Max

[nicobi]

Hi.

I am getting a confusing latency readout in an empty Reaper session compared to e. g. LPX or Live on a Macbook Pro 16" M1Max with built in standard IO. This has been on macOS 12.4.x and is on macOS 12.5 alike.

• Create an aggregate device with Mic as input and Speaker as output
• Choose the device as audio device

Reaper:

48 kHz 24 bit WAV: 1/2ch 128spls ~55/20ms

LPX:

48 kHz 24 bit BWF: 11,0 ms Roundtrip (5,7 ms Output)


Live 11.1.6:

48 kHz 24 bit AIFF: Input 2,67 ms, Output 5,67 ms, Global 8,33 ms


I have no idea what Reaper measures here. Is it just reporting wrong values ? I have the feeling it makes me look stupid…

Justin, Shwa, any hint in this department ?


Thanks