# test tone

drillable.com › busycircuits-com › mfx › program › utilities › test tone.
As of the index built 9 Sep 2026, 17:46 UTC · [cites, never asserts](/standing).
Source: ALM Busy Circuits MFX, by https://busycircuits.com.
MCP https://mcp.drillable.com · [html](/e/busycircuits-com/mfx/program/utilities/test-tone.html) · [markdown](/e/busycircuits-com/mfx/program/utilities/test-tone.md) · [json](/e/busycircuits-com/mfx/program/utilities/test-tone.json) · [discovery](/.well-known/drillable.json) · [guide](/llms.txt)

## Records (1)

By drillable.com ([llm-extract/1](/standing#methods)); scored precision 1.00, recall 0.39 on the harness's last sample of 33.

- **frequencies** = 440Hz A or 261.6Hz C · [quote](/r/sha256:2561e811553af4233cee6b1ad0b26a8aef2511a1c3265875cd2499f2902195a6?trace&start=36303&end=36392) · [sha256:4fe951f86f11bf9b…](/r/sha256:4fe951f86f11bf9bd3227bdf5b540a83218f6e410e0e3dfbb0f6d8cade93090b)

Everything here is a record by a named reader, arranged; where readers disagree, both are shown.
No reader has asserted a label for it; the title is its address.

---
[standing](/standing) · Drillable™ is a trademark of Drillable LLC.