
Website, pricing, platforms and company facts side by side.
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| Website | jjazzlab.org | opalstack.com |
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| Platforms | — | |
| Company | 2019 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


JJazzLab is a free and open-source application which automatically generates backing tracks for any song. You type in chord symbols, select a rhythm (style), then JJazzLab generates a complete backing track with drums, bass, guitar, keyboard, strings, etc. JJazzLab can read Yamaha style files,...
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What each product offers, as listed by its team.


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As answered by people managing JJazzLab and Opalstack.
JJazzLab's answer
JJazzLab's answer
As a jazz/funk pianist I have tried most of the auto-accompaniment or backing tracks apps (Band In a Box, etc). They are good indeed and I had some fun at first, but I quickly got frustrated: I missed the intensity dynamics which help develop interesting solos. I was aware that a program will never match a real band, but I had a few ideas how to do better. That’s why I decided to start developing JJazzLab.
JJazzLab's answer
Java, Apache Netbeans platform.
JJazzLab's answer
JJazzLab's answer
It's free, it's simple yet powerful and constantly evolving.
JJazzLab's answer
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When comparing JJazzLab and Opalstack, you can also consider the following products.

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ChordPulse is interactive software that’s designed to help you learn music on your instrument.
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GNU LilyPond is a computer program for music engraving.
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