Why the Mustang Micro cuts off the click
You run a metronome on your phone, send it over Bluetooth to the Mustang Micro, and something sounds off: missing beats, soft attacks, or a downbeat that never shows up. It's not your ears and it's not the metronome. It's how Bluetooth audio works.
The cause: Bluetooth hates silence
To save battery, many Bluetooth audio devices stop processing or attenuate the signal when they detect silence. Some do it on the phone side, which stops sending audio; others do it in the receiver, which applies something like a noise gate. When sound comes back, the link needs a few milliseconds to wake up again.
With music you barely notice, because something is always playing. A metronome is the opposite: a 50-millisecond hit followed by half a second of nothing. Every click arrives right as the link is waking up, and the first thing lost is the attack, which is exactly the part you need to play in time.
It happens with the Fender Mustang Micro and also with many wireless headphones, Bluetooth speakers and other practice amps with Bluetooth input.
The fix: never stop sending audio
If a very quiet signal plays between hits, the link never goes into silent mode and every click arrives whole. That's what the background signal in Bluetooth Metronome does.
- Pair your phone with the Mustang Micro (or your headphones) and open the metronome.
- Pick a groove and press Play.
- Under Background signal, start at 5%. If the click still sounds chopped, raise it 2 or 3 points at a time.
- Keep the lowest value where the click sounds whole. It's usually between 5 and 15%.
Pink noise or low tone?
| Type | What it sounds like | When to use it |
|---|---|---|
| Soft pink noise | A faint hiss, like a distant fan. | The default. Works with almost every device. |
| Low tone (35 Hz) | Nearly inaudible on small headphones. | If the hiss bothers you. Some receivers filter out low frequencies and ignore it; if it doesn't work, go back to pink noise. |
A separate issue: latency
Bluetooth also adds a fixed delay, usually between 100 and 250 milliseconds. That means the lights on screen run slightly ahead of what you hear. Play to the sound, not the screen. Since the delay is constant, the tempo stays perfectly steady.
If it still drops out
- Turn the phone volume up and the Mustang Micro volume down, not the other way around: a stronger signal at the source helps.
- Turn off your phone's battery saver while you practice.
- Keep the phone close, without your body in between: interference also causes dropouts.
- Try the subdivided click (Eighth click): more hits per bar means less silence.