# The problem of sound delay in record.cpp
**URL:** https://qa.fmod.com/t/the-problem-of-sound-delay-in-record-cpp/13757
**Category:** FMOD Engine
**Created:** [March 14, 2018, 1:52am UTC](https://qa.fmod.com/t/the-problem-of-sound-delay-in-record-cpp/13757 "2018-03-14T01:52:14Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@yourk](https://qa.fmod.com/u/yourk)
#### Post date: [March 14, 2018, 1:52am UTC](https://qa.fmod.com/t/the-problem-of-sound-delay-in-record-cpp/13757/1 "2018-03-14T01:52:14Z")
Hello, I am using record.cpp demo to develop record sound function, the record code is right running and my headphone also and listen playback, but, these is a serious problem, the playback sound is about 10% delay compare to my recording voice, it result in my record music experience is disorder, some relate code is underline:
```
lastPlayPos = playPos;
samplesPlayed += playDelta;
/*
Compensate for any drift.
*/
int latency = samplesRecorded - samplesPlayed;
actualLatency = (0.97f * actualLatency) + (0.03f * latency);
int playbackRate = nativeRate;
if (actualLatency < (int) (adjustedLatency - driftThreshold)) {
/* Play position is catching up to the record position, slow playback down by 2% */
playbackRate = nativeRate - (nativeRate / 50);
} else if (actualLatency > (int) (adjustedLatency + driftThreshold)) {
/* Play position is falling behind the record position, speed playback up by 2% */
playbackRate = nativeRate + (nativeRate / 50);
}
channel->setFrequency((float) playbackRate);
ERRCHECK(result);
```
Is someone has met such problem? hope you can tell me how to adjust the playback delay, it is appreciateļ¼
---
### Author:  [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)
#### Post date: [March 18, 2018, 11:04pm UTC](https://qa.fmod.com/t/the-problem-of-sound-delay-in-record-cpp/13757/2 "2018-03-18T23:04:04Z")
Do you get the delay when using the example without any changes?
Are you using a bluetooth headset?
What version of FMOD are you using?