The Sequential Prophet X allows users to create and distribute their own installable collections of samples. Ideally, every feature the instrument is capable of, including multiple velocity layers per key and sets of round-robin samples chosen at random would be easily accessible to users putting together custom instruments.

Enter PXToolkit, an ambitious project to enable instrument creation using every feature supported by the hardware. What follows is a demonstration of the basic workflow running on macOS:

In addition to the features shown above there are numerous conveniences fully documented including dragging samples between regions, instant audio previews for individual samples, and natural playback of full chords with velocity and round-robin selection using an attached MIDI controller. The same features are supported identically in the Windows version. Both are available from the download link at the top of the page.

PXToolkit creates installable .zip archives that the Prophet X can load into the eight available user banks, enabling more than 13,000 custom instrument slots across seventeen categories per bank. The 50GB of space for additional samples in the Prophet X are definitely a key part of making the most of the instrument!



Treat H as equivalent to B in note names for compatibility with SampleRobot's export naming conventions.


Improved compatibility with files that have upper-case extensions like .WAV


AIFF support works just like WAV support has from the start. Dragging and dropping a sample from the macOS Finder or Windows File Explorer into a PXToolkit document window is all it takes. Metadata describing the original pitch and looping are automatically extracted, and at export time conversion into the right format for the Prophet X is automatic.

24-bit support applies to both WAV and AIFF sample files. Samples load and preview just like their 16-bit counterparts, and when exported they're automatically dithered to high quality 16-bit counterparts as required by the Prophet X.

Integrated documentation isn't fancy, but it gives immediate access to everything in the original README file packaged with the app, now conveniently accessible from the Help menu.


The following exchange tool place on gearslutz.com shortly after the beta release of PXToolkit:

"I sometimes imagine a world for Prophet X users where Lady Gaia did not buy one and where we would all be right now and I am so thankful it is only something I have to imagine. ~ Mark Thomas Walker

"WHY WOULD YOU DO THAT?!" ~ @markodarko

"It's like one of those Netflix 'odd horror/sci-fi of the week movies'" ~ @ZT Scheer


Written for macOS and Windows by @LadyGaia. Copyright © 2019.

Thanks to my alpha and beta testers, particularly @blewis_13, @ukvoyager, and @ComposerJK who were able to provide timely feedback early in development.


PXToolkit Copyright © 2019. Free for personal use. Write to info@thinkersnacks.com for permission prior to releasing instruments prepared with PXToolkit for commercial purposes.

Remember that audio material is broadly protected by copyright law. Respect the rights of content creators by ensuring that you have the legal right to use any audio material you package using PXToolkit.


ThinkerSnacks.com and the PXToolkit product are affiliated with neither Sequential LLC nor 8Dio. Visit Sequential.com for official information from the manufacturer regarding the Prophet X. This software is provided AS IS with no implied warranty. Use at your own risk, knowing that you accept full responsibility for resolving any issues that may arise.