About HertzSpot
HertzSpot has three free audio tools that run in your browser. There is nothing to install and no account.
Spectrum Analyzer
Open an audio file or your microphone and see what is in the sound. Point at any spot to see its frequency, the musical note, and how loud it is.
- Find a hum, buzz or hiss in a recording, and see its exact frequency so you know what to cut.
- Work out the notes of a melody or a bass line.
- Save a picture of what you found to show someone else.
Pitch Detector
Drop in a recording of your singing, or sing live. It shows which notes went sharp or flat, when, and by how much.
- Check a recording and hear each note that went off.
- Use the live mic to practice one note until it is in tune.
Vocal Range Test
Sing your lowest note and your highest into the microphone. It shows them on a piano, next to the usual range of each voice type.
- Find out how low and how high you can sing.
- Test again from time to time and compare your results.
Your audio stays on your device
All three tools work inside your own browser. Nothing is uploaded, and what the microphone hears is never recorded or saved. Close the tab and it is gone.
We do count visits and which features get used, such as how many files are opened each day. No cookies, and nothing that says who you are. The privacy policy has the details.
What they do not do
- They open one file at a time.
- In the spectrum analyzer, files over 30 MB show frequencies up to about 11 kHz, so they fit in the browser’s memory.
- The spectrum analyzer is not made for measuring a room. A phone app is better for that.
- The pitch detector is made for the voice. Loud music behind the singing can throw it off.
- The vocal range test can’t tell your voice type for sure. Range is one clue; where your voice feels easiest matters too.