96000 hz recording limit

Special Interest Groups Audio Processing
1

Hey Guys,
I got my djm 2000 nexus here and I was wondering if anyone here knew the recording limit (exmple 13 hours) for audacity with the sample rate set on 96000Hz and the bit rate set on 16bit

Thanks in Advance

Regards

2

The current limit for being able to reopen an Audacity Project recorded at 96000 Hz is about 6.2 hours (2^31 samples).
The bit format is not relevant to recording duration, so if you intend to edit/process the recording then I’d recommend that you keep the sample format at the default 32 bit float.

The issue of using high sample rates is hotly debated but I’m still waiting to see/hear any verifiable evidence that higher than 48 kHz has any benefits unless recording bats / music for dogs / ultrasonic experiments / etc.

3

Perfect Thanks for you help and time ^^
I just had one more question, if I leave the sample rate to 96000 Hz and 32bit rate; A 4 hour set would take up how much disk space?

Thanks in Advance

Regards

4

The amount of data can be calculated:
sample_rate x bits_per_sample x number_of_channels x duration_in_seconds

Thus for 96000 Hz sample rate, 32 bit float, stereo (2 channels):
96000 x 32 x 2 = 6144000 bits per second.

For bytes per second, divide by 8.

For kB per second divide the number of bytes by 1024

so for 96000 Hz sample rate, 32 bit float, stereo (2 channels):
96000 x 32 x 2 = 6144000 bits per second.
6144000 / 8 = 768000 bytes per second.
768000 / 1024 = 750 kB per second.

For 1 minute of audio, multiply by 60.
For 1 hour of audio, multiply by 3600

750 kB per second = 2700000 kB per hour.

So 4 hours = 2700000 x 4 = 10800000 kB
which is about 10.3 GB.

Note that if you do any editing, the amount of data increases because the Undo history is retained on disk until the project is closed.
Also you need to have sufficient disk space to export the final file.

On Windows, you should ensure that there is at least 10% free disk space at all times to allow Windows to perform necessary disk management tasks.

For working on such a large file I would recommend at least 200 GB of free disk space.
Note also that because of the huge amount of data being moved around, everything is likely to run slowly.