Synth-pop: a drum-machine beat, octave bass, chorused pad and a synth hook

Take the loop apart

Press Play and let the eight bars loop a few times. Each row is one track of an Ensemble Set: Drums on T1, Bass on T2, Pad on T3 and Lead on T4. All four parts are original MIDI written for this lesson. The Ensemble instrument plays them live in your browser, so what you hear comes from the same devices you can edit.

The sections below build the loop up one layer at a time. Use Solo and Mute in the player as you read. Edit sound opens a part's Ensemble editor on this page: turn a knob while the loop plays to hear what it does, or play the keys while the loop is stopped. Reload the page to get the lesson's settings back.

1. The machine beat

Solo Drums. Unlike house, the kick does not hit every beat: it plays on beat 1, on beat 3 and on the off-beat right after beat 3. A snare and a clap land together on beats 2 and 4, with the clap tucked under the snare, so the backbeat is big and heavy while the kick stays light.

Closed hi-hats run in eighth notes, a little louder on each beat than between the beats. On the last off-beat of the bar an open hat takes over and tips you into the next bar. The Drum engine treats the hats like a real hi-hat: the closed hat on the next downbeat cuts the open one off, the way a drummer's foot closes the cymbals.

Every second bar changes a little: the third kick moves earlier, to the off-beat after beat 2, and a soft ghost snare sits just before the bar line. In bar 8 the last beat is a fill: four toms in sixteenth notes, falling from high to low, drop you back into bar 1. Every hit is quantized and the swing is zero. The beat feels alive only through its accents, which is exactly the machine sound synth-pop is known for.

2. The motor: an octave bass

Now solo Bass and notice that it never stops. It plays eighth notes on the root of each chord and bounces between two octaves: the low root on every beat, the same note an octave higher on every off-beat. The low notes line up with the kicks, and because the kick is sparse, the bass fills the low end in between.

Each note is a little shorter than an eighth, so the line stays bouncy instead of blurring. Listen to the last eighth of bar 8: instead of the high E, the bass plays G♯, the note just below A, and that pulls the loop back to its start.

3. Bittersweet chords

Add Pad. The progression has one chord per bar, and the second half changes the ending:

• Bars 1–4: i – VI – III – VII (A minor – F major – C major – G major)
• Bars 5–8: i – VI – iv – V (A minor – F major – D minor – E major)

Roman numerals name each chord by the step of the scale it is built on: lower case for minor chords, upper case for major ones. The home chord is minor, but most of the chords around it are major, and that mix sounds hopeful and sad at the same time. This bittersweet mood runs through a lot of synth-pop. In A minor the fifth chord would normally be E minor; bar 8 borrows E major instead. Its G♯ is a half step below A, so the loop restarts with a push.

Look at the pad's notes in the clip: C4 holds through the first three bars and A3 through the first two, and each chord change moves only one or two notes by a step. Because the pad never jumps, even long chords sound smooth. The bass plays the roots, so the pad can stay in a tight cluster around middle C.

4. The hook: a question and an answer

Add Lead. Bars 1–4 ask a question and bars 5–8 answer it: the answer starts the same way and then ends differently. The melody stays in the range a singer would use, with quarter and eighth notes and a held note at the end of each phrase. In synth-pop, the lead synth often stands in for the voice.

On strong beats the hook mostly lands on a note of the chord underneath: E over A minor, F over F major, D over D minor, B over E major. The quick notes between them are steps that connect them. The dotted-eighth echo of the delay fills the gaps between phrases.

5. Mix it like the 80s

Each part starts from an Ensemble factory sound, with a few settings changed for this arrangement. Edit sound shows every value, and the same project opens in the DAW. A value written as 40/127 is the knob's stored number on a 0–127 scale; the editor's display may show it converted, for example as a percentage or a time.

Drums (T1): the Drum engine

The DRUM KIT sound on the Drum engine is a synthesized drum machine. Notes follow the General MIDI drum map: 36 is the kick, 38 the snare, 39 the clap, 42 the closed hat, 46 the open hat, and 50, 48, 45 and 43 are the toms. KIT is switched to 80, a kit in the style of an early-80s drum machine. DECY goes down to 56/127 for slightly tighter drums, SNAP up to 72/127, the kick model is PUNCH and DRV adds a little grit at 10/127. A reverb send of 25/127 (REV) gives the snare its room.

Bass (T2): Duo, square wave

SQR BASS runs the Duo engine on a square wave through a low-pass filter that opens briefly on every note. RES goes down from 70/127 to 40/127 and DRV from 40/127 to 20/127 for a rounder tone. A shorter decay (DEC 55/127) and release (REL 25/127) keep every eighth short and even, and the MONO voice mode with no glide starts each note cleanly. The bass stays almost dry: no chorus or delay, very little reverb.

Pad (T3): Duo, pulse-width strings

PWM STR uses the Duo engine's PWM wave, a pulse wave whose shape keeps moving, with the two oscillators slightly detuned. Its slow attack and long release make each chord swell in and fade out. The pad keeps the preset's generous reverb (REV 60/127), raises its chorus send from 50 to 60 (CHO 60/127) for the wide, shimmering sound of 80s string synths, and lowers its delay send from 20 to 15 (DLY 15/127). An EQ Eight after the instrument cuts everything below 180 Hz, so the pad does not cloud the bass.

Lead (T4): Duo, saw wave

SAW LEAD stacks two saw oscillators detuned by 12 cents in the LEG voice mode. Glide is off (GLD 0/127), so every note of the stepwise melody lands straight on its pitch instead of sliding into it. A sine LFO on the pitch adds a gentle vibrato - about 5.5 Hz and ±19 cents (RATE 89/127, PIT +1) - that fades in after each note starts (FADE 60/127), much like a singer holding a note. A delay send of 45/127 (DLY) makes the echoes.

The set's shared effects

The four parts share the Ensemble Set's Chorus, Delay and Reverb returns, each with its own send amounts. The chorus runs slowly (CRT 40/127) at medium depth (CDP 60/127). The delay is set to 1/8D, a dotted eighth, with feedback at 50/127, so lead echoes land between the beats. The reverb uses the HALL type with SIZE 90/127. On the master, LOWCUT stays OFF and MASTER is lowered from 127 to 112 to leave headroom.

Try this in the DAW

Open in the DAW loads this exact project into the browser studio. The Lead track is selected and armed, and its Ensemble editor is open: play the on-screen keys or your computer keyboard to try your own hook over the loop. Then try these three changes:

1. Brass stabs: load the BRASS preset on T3 and turn each whole-note chord into short stabs on the off-beats (the “and” of every beat, each a sixteenth note long). The loop turns from dreamy into punchy dance-pop.
2. Arpeggiate: put an Arpeggiator MIDI effect in front of T3's instrument (Style Up, Rate 1/16, 2 octaves, Gate 50 %). The same chords become a sequenced 80s arpeggio. Lower the pad's ATK to 0/127 and REL to 30/127 so the notes are crisp. Use the Arpeggiator device: the Ensemble's own ARP page does not play in TuttiDAW yet.
3. Four on the floor: in T1's clip, add kicks on beats 2 and 4 and remove the kick on the off-beat after beat 3. The groove moves from synth-pop towards Hi-NRG and dance-pop. Compare the energy.

Your edits stay in that temporary project. They do not change this page.