Open your project in DaVinci Resolve
Go to the Deliver page
In the Render Settings panel, choose Custom Export
Set the format to WAV, MP3, AIFF, or another audio format if available
Select the audio tracks you want to export in the timeline
If needed, solo or mute tracks to isolate the desired audio
In the Audio section, enable Export Audio
Set the sample rate, bit depth, and channel format as needed
Choose whether to export the entire timeline or an In/Out range
Add the job to the Render Queue
Click Render All
If exporting separate tracks, duplicate the export process for each track or use track routing/mix bus settings
If exporting stems, assign each track or group to its own bus before rendering
Save the exported audio file to your chosen destination