Play a low note on the drum synth below and let it ring. That's an 808: a kick drum with a tail long enough to carry a bass line. It comes from Roland's TR-808 drum machine, released in 1980, whose bass drum could be set to boom for a second or more. Hip-hop and Miami bass producers leaned on that boom through the 1980s, and in trap it became the bass line itself, tuned note by note under the hi-hats.
Play a few low notes in a row. Can you hear a pitch in each one, or only a thump?
The finished 808
What makes it work is two things happening at different speeds. The pitch falls very fast, which you hear as the punch. The volume fades slowly, which you hear as the note. Which setting do you think makes the boom last longer, Drop or Decay?
1. Make the tail sing a note
Change Drop, then Decay. Which one makes the boom longer, and which one changes the punch?
Punch and boom
The lab starts as a kick: a short boom. Raise Decay to about 1.4 seconds. The hit now leaves a long, steady tone behind it. That tone is your bass note.
Note Track is on, so each key plays a different pitch, like a keyboard. End is set to 65.4 Hz, the frequency of C2, so the low C plays a real C and every other key lands in tune with it. Now you can play a bass line.
Why: Drum synthesis explains how a kick is a sine with a pitch fall and a volume fade.
2. Keep the punch short
Now raise Drop slowly. The start of the note turns into a long downward swoop, and the pitch takes so long to settle that the note sounds out of tune. Bring it back to around 0.04 seconds. Now the swoop is over before you notice it as pitch; you hear it as a knock, and the note underneath is steady.
Two speeds in one hit
Why: Envelopes shows how one contour can shape pitch while another shapes loudness.
3. Add grit so small speakers can hear it
A 65 Hz sine is felt more than heard. Laptop and phone speakers barely play it, so on those the 808 can vanish. Raise Drive a little. Drive bends the sine into a slightly squarer shape, which adds harmonics at three and five times the note (and more above). Those are high enough for a small speaker to play, and your ear fills in the low note from them. Now the bass line is audible on your phone, not only on big speakers.
Stop before it turns fuzzy, unless fuzz is what you want; plenty of modern trap 808s are driven hard on purpose. The small click at the front (Amount, in the Click section of the synth at the top) does a similar job for the attack.
Why: Distortion explains where the new harmonics come from.
4. Leave room between the notes
Play two different notes close together. Each one keeps ringing for its full Decay, so they overlap and the low end turns muddy. These notes don't slide into each other either; each one is its own hit. If the line gets cloudy, shorten Decay or leave more space between notes. Listen for each note to have room to ring.
Why: Low end treats note length and overlap as part of bass clarity.
5. Check it on the speaker people will use
Play your line on the synth at the top, then listen on your phone or laptop speaker. Can you still follow the notes? If not, nudge Drive up or play the line an octave higher. Check again whether you can follow the notes on that speaker.
Why: Listening and comparing keeps one question in mind while you switch speakers.
Keep it
Press Save in the bar under the Kicker at the top and call it "808 Sub". Next time a beat needs a bass, it's ready and in tune, and you already know the two controls that matter: Decay for how long each note lasts, Drive for whether a phone can hear it.
Quick check
- Your 808 notes sound slightly out of tune, as if each one bends down into place. What do you change? Shorten Drop. A long pitch fall keeps the note moving long enough to hear it as pitch. Lengthening Decay is tempting because it feels like "more 808", but it only changes how long the note lasts.
- The bass line sounds great in the studio and disappears on a phone. Why, and what helps? The phone can't play the fundamental. Drive adds higher harmonics that it can play, and your ear rebuilds the low note from them. Turning the level up won't help much; the phone still can't reproduce 65 Hz.
- Two quick notes blur into a rumble. Is the answer more Decay or less? Less, or more space between the notes. Each hit rings for its full Decay, so overlapping tails stack up. A long Decay suits slow, spacious lines.
Next steps
- Use it: Sidechain pump. Shape a deliberate duck around the kick, and choose when the bass comes back.
- Sideways: Riser and impact. The same synth, with a longer drop and more drive, becomes the hit that lands a build-up.
