Hi meinmontco,
Thank you for joining the Bose Hear Community. It sounds like you're getting good use from and are enjoying your Bose Hearphones. That's terrific.
I did some research about latency and live sound monitoring and found:
aptX Low Latency targets < 40 milliseconds latency
Source: https://www.qualcomm.com/products/features/aptx
Acceptable Latency Values
Here are some thoughts on acceptable values for different recording purposes:
Vocals: This is the most difficult example, because anyone listening to their vocals in 'real time' will have headphones on, and therefore have the sounds 'inside their head'. A latency of even 3ms can be disconcerting in these conditions.
Drums & Percussion: I suspect most drummers will prefer to work with latencies of 6ms or under, which should provide an 'immediate' response.
Guitars: Electric guitarists generally play a few feet from their stacks, and since the speed of sound in air is roughly a thousand feet per second, each millisecond of delay is equivalent to listening to the sound from a point one foot further away. So if you can play an electric guitar 12 feet from your amp, you can easily cope with a 12ms latency.
Keyboards: Even on acoustic pianos there's a delay between your hitting a key and the corresponding hammer hitting the string, so a smallish latency of 6ms ought to be perfectly acceptable to even the fussiest pianists. Famously, Donald Fagen and Walter Becker of Steely Dan claimed to be able to spot 5ms discrepancies in their performances, but the vast majority of musicians are unlikely to worry about 10ms, and many should find a latency of 23ms or more perfectly acceptable with most sounds, especially pads with longer attacks.
Source: https://www.soundonsound.com/techniques/optimising-latency-pc-audio-interface
I'm attaching a more technical article: The Effects of Latency on Live Sound Monitoring (AES_Latency.pdf)
It looks like Bluetooth (even aptX Low Latency) is not fast enough for live music monitoring.
I hope you found this interesting.
ST
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