Can live drums generate MIDI clock?

Yes. A beat tracker listens to the drums through a microphone, estimates the tempo and beat positions, and outputs MIDI clock (24 pulses per quarter note) that follows the drummer. DrumClock does this on an iPhone, iPad or Android phone.

Do I need drum triggers to get MIDI clock from a drummer?

No. A phone's microphone near the kit is enough for a beat tracker, or a kick and snare mic through a USB interface. Triggers help but aren't required.

What happens when the drummer stops or plays a fill?

A good tracker ignores fills and ghost notes because they land between beats, and holds the last tempo through a break so the clock keeps running until the drums return.

Guide

MIDI clock from live drums: make the drummer the master clock

In most rigs the clock flows one way: a laptop or a drum machine is the master, and everybody (including the drummer, through in-ears) follows it. That works until the band doesn't have in-ears, or the drummer doesn't want to play to a machine. Then the delays, arps and sequencers are on one tempo and the band is on another.

The fix is to turn the clock around. Let the drummer be the master, and have something listen to the kit and send MIDI clock that follows them.

What a drum-to-clock tracker does

Listens to the kit through a microphone (a phone near the drums is enough) or a kick and snare feed.
Finds the beat: tempo and where beat one is. A stick count-off makes this instant; without one, a couple of bars.
Follows as the drummer pushes and lays back, easing toward the new tempo rather than jumping, and ignoring fills and ghost notes that land between beats.
Sends MIDI clock (24 pulses per quarter note, with Start and Stop), a tap-tempo message on every beat, or both.

Clock or tap tempo?

MIDI clock is the continuous stream most gear locks to: Helix and HX, Strymon and most MIDI pedals, Ableton Live, MainStage, synth arpeggiators, drum machines. Tap tempo is a single message per beat that the device treats like you pressing its tap button. Use it for gear that won't take clock, like Sunday Keys, or pedals whose tap jack you can drive over MIDI. Sending both at once covers a mixed rig.

How tight does it get?

Tight enough for time-based effects, which is the job: delay repeats, arps, tremolo and LFOs land on the drummer's beat. The transport you use matters more than the tracker:

Wired USB MIDI (interface, powered hub, 5-pin cable) is the tightest. DIN-to-XLR adapters run it through a spare snake channel.
Same device (tracker and Sunday Keys on one iPad) is just as tight.
Network MIDI is good over Ethernet, so-so over Wi-Fi.
Bluetooth MIDI jitters on clock; fine for tap tempo and rehearsal.

It is not a replacement for a click when you're running backing tracks that can't move. If the tracks are fixed, the band has to follow them. This is for bands where the drummer leads.

DrumClock

DrumClock is the tracker I built for this. Phone or iPad by the kit, stick count-off, and it sends MIDI clock and a tap-tempo CC on the drummer's time, with presets in set order, Hold for rubato sections, and ÷2 / ×2 for half-time feels. Audio is analysed on the device and never recorded or uploaded. Free to try for 14 days; after that the free tier keeps 10 minutes of MIDI output a day, and Pro is $19.99 a year or $49.99 once.

Download on the App Store Get it on Google Play

Setup by rig: syncing delays and arps to a live drummer · Sunday Keys tap tempo.