
SUS4 Backing Tracks: Jam Along
Blues, jazz, funk in any key
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Free
In-App Purchases
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About
A drum, bass and keys band to improvise over, in the style and key you pick.
Blues, jazz ii-V-I, funk, gospel, hip-hop, Latin, R&B, reggae and more, generated on your phone, so it works with no signal.
Fully on-device: no cloud, no account.
Choose a style and a key, set the tempo, and play. Use Solo Me to drop a part out and play it yourself: take the bass out and you are the bass player. Write a chord progression in the editor when the library does not have the changes you need.
• Tracks by style, each labeled with its key and tempo
• Change key and tempo
• Solo Me: mute a part and play it
• A chord progression editor for other changes
• Loop a section to work on it
For guitarists, bassists and keyboard players learning to solo, and anyone who wants to practice with a band instead of a metronome.
Pro, or SUS4 All-Access across the whole range, opens the full track library, key and tempo changes, looping and stem export.
Made in the UK by working musicians.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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What's New in SUS4 Backing Tracks
1.3.0
October 31, 2026
Jam challenges: play along with a track and see how often you land on the chord tones, chord by chord.
2
Subscriptions & In-App Purchases
SUS4 All-Access
Pro in every SUS4 app, billed monthly.
$5.991 Month
7 Days trial








