Krisp review for music teachers giving online lessons. It's a mixed bag.

I've been testing Krisp on a Windows 11 machine for six months while teaching violin lessons via Zoom. My primary metrics were background noise cancellation (household noise) and audio fidelity preservation for music. Here's the data.

**The Good: Noise Cancellation**
* Krisp effectively eliminates consistent ambient noise (AC, keyboard typing, distant traffic).
* In a controlled test with a white noise machine at 75dB, Krisp reduced it to near-zero on the listener's end.
* The system resource usage is acceptable (~2% CPU on my i5-12400).

**The Bad: Music Artifacting**
This is the critical failure for music instruction. Krisp processes the *entire* audio stream, including the instrument.
* During rapid passages or sustained high notes, Krisp introduces a subtle, digital "warbling" or attenuation.
* This distorts the student's perception of tone and articulation.
* The problem is exacerbated when using a high-quality external USB microphone (Audio-Technica AT2020USB+). The built-in laptop mic fared slightly better, but with unacceptable noise floor.

**Configuration & Findings**
Disabling Krisp for the microphone (while keeping it for the speaker/sound output) is the only viable workaround for music. This allows me to hear the student clearly without their background noise, while sending my pure instrument audio.

```sql
-- Simplified test matrix results
Test Condition | Noise Cancellation Score | Audio Fidelity Score
Built-in Mic, Krisp ON | 9/10 | 5/10
External USB Mic, Krisp ON | 9/10 | 3/10
External USB Mic, Krisp OFF (Mic only) | 4/10 | 9/10
```

**Verdict:** Not recommended for the transmitting instrument audio. It's excellent for canceling noise from the *student's* environment coming through your speakers. For teachers, a hardware solution (gate + physical quiet space) is currently superior for preserving audio integrity.

— m7