A 30-minute recording file is transcribed in 100 s on a CPU.
Measured on one single-track file, such as an upload. A meeting recorded in NexusVox has two tracks, your microphone and the system audio, which are transcribed separately, so it takes longer; that case was not measured. Speaker labels need the GPU container.
- to transcribe a 30-minute recording on a CPU
- 100 s
- Ryzen 7 5800X, 16 threads, no GPU
- faster than the recording is long, on a CPU
- 18×
- Ryzen 7 5800X, 16 threads
- of memory at the peak, for that 30-minute file
- 2.25 GB
- Ryzen 7 5800X, 16 threads
30 min Length of the file
→ 100 s Time to the transcript
An example from our own measurements, not a customer story.
With fewer threads, a recording takes longer.
The same desktop CPU pinned to eight and to four threads, on a 5-minute recording file. A slower CPU will be slower still. The real-time factor is processing time divided by audio length: lower is faster.
- real-time factor for a 5-minute recording on 8 threads
- 0.067
- Ryzen 7 5800X, 8 threads
- real-time factor for a 5-minute recording on 4 threads
- 0.296
- Ryzen 7 5800X, 4 threads
- of memory with the speech model loaded
- 777 MB
- Ryzen 7 5800X
0.067 8 threads, real-time factor
→ 0.296 4 threads, real-time factor
An example from our own measurements, not a customer story.