Audacity Forum

Thanks. I can cause the crash reliably. I'll be putting in a bug report for this. The cause is almost definitely due to having tracks with different sample rates. Workaround: after bringing in your MP3 track (at 44100), select the track then do Tracks > Resample and choose 32000 in the dialog. Now a...

For the project that crashes reliably, could you describe each track - mono/stereo, WAV/MP3, and sample rate. I can't reproduce the crash with a mono 44100 WAV and a stereo 48000 MP3 arranged as you describe.
-- Bill

Do your WAV and MP3 files have different sample rates?
-- Bill

If it is, as Steve said, just the lagging cursor and not slowed-down sound, the issue is likely a 30-bit display on your new Macbook. With Audacity not running, right-click on the Audacity icon and select Get Info. In the Get Info dialog, check "Open in Low Resolution". Start Audacity and see if tha...

Your client must be listening on headphones, really loud. To use the Noise Reduction effect you need to first select a sample of the track that is just the noise you want to remove. I selected starting at 1.775 seconds with a length of 0.383 seconds (just after the word "listener" and before the cli...

New desktop Macs do not have a line input. The jack you have connected to is the headphone jack.
-- Bill

Are you getting a stereo track recorded with one channel silent? Or are you getting a mono track?

-- Bill

I made sure that the Apogee Maestro app was disabled By disabled, do you mean "not running"? Devices should be connected and turned on before launching Audacity. Or, in Audacity, you can do Transport > Rescan Audio Devices . So it seems the Meatro app is somehow hihacking the audio from the ONE and...

If recording in Audacity via the internal mic is working then either there is an issue with USB audio or there is an issue with Audacity connecting to the Traktor. Do you have any other USB audio interfaces you can try out? I am not familiar with the Traktor 10, so I can't give any specific advice t...

As a first step you should upgrade to Audacity 2.4.2.

-- Bill