A buffer is a region of memory storage used to temporarily hold data while it is being moved from one place to another. This can add up to another millisecond or so.īuffers.
On the other end of a long chain we’re about to describe are the digital-to-analog converters that change the digital stream back into electrical impulses you can hear through a monitor speaker or headphones. This is a ferociously complex process and takes a little more than half a millisecond on average. Analog-to-digital converters in your interface transform an analog signal from a microphone or instrument into digital bits and bytes.
REAPER INPUT DELAY DRIVER
In practical terms, the amount of roundtrip latency you experience is determined by your audio interface’s A/D and D/A converters, its internal device buffer, its driver buffer, and the buffer setting you have selected in your digital audio workstation software (Mac®) or Control Panel (Windows®).Ĭonverters. Any significant amount of latency can negatively impact the performer’s ability to play along to a click track or beat, making it sound like they’re performing in an echoing tunnel. Roundtrip latency in digital-audio applications is the amount of time it takes for a signal, such as a singing voice or a face-melting guitar solo, to get from an analog input on an audio interface, through the analog-to-digital converters, into a DAW, back to the interface, and through the digital-to-analog converters to the analog outputs. It is this amount of delay that we must battle constantly when recording and monitoring digitally. However, by around 12 to 15 ms (depending on the listener), you will start to “feel” the effects of a delayed signal. Studies have shown that sound reflections in an acoustic space must be delayed by 20 to 30 ms before your brain will perceive them as separate.
Your brain is wired so that it doesn’t notice if sounds are delayed 3 to 10 milliseconds. In the audio world, “latency” is another word for “delay.” It’s the time it takes for the sound from the front-of-house speakers at an outdoor festival to reach you on your picnic blanket, or the time it takes for your finger to strike a piano key, for the key to move the hammer, for the hammer to strike the string, and for the sound to reach your ear.
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