SpectrumGen vs MuseBud
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SpectrumGen
Create unique sounds by drawing their spectral representation. This synthesizer offers real-time sound generation and export options, with customizable octaves and MIDI support for enhanced musical expression.
- Draw sound spectrum in real-time
- Export to WAV format
- Eight predefined timbres
- Adjustable octaves (2-8)
- MIDI keyboard support
- Audiobus and IAA compatible
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SpectrumGen is a spectral synthesizer with a minimalistic pixel interface. It's a bit like the PixelWave, but now you can draw the spectrum of sound! Key features: • it is possible to draw the spectrum and play it at the same time; • export to WAV; • eight predefined timbres; • changeable number of octaves (from 2 to 8); • MIDI keyboard support; • Audiobus and IAA support. Dark colors - low frequencies (bass). Bright colors - high frequencies.
MuseBud
This app generates musical notes based on user-defined probabilities for various musical parameters. It includes a looper for capturing and repeating sequences, with detailed editing capabilities for individual notes within the loop. It's a powerful tool for creating complex and evolving musical patterns.
- Generative note creation with customizable probabilities
- Adjustable note, octave, duration, velocity, gate, and ratchet parameters
- Integrated looper with up to 64-note buffer
- Step editing within the looper
- Multiple pattern support with independent looper buffers
- Key and scale customization
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MuseBud, a generative MIDI sequencer, creates notes based on the possibilities you define. Customize the chances for every aspect, including notes, octaves, note lengths, velocities, gate lengths, and ratchets. Each mode (note, octave, duration, velocity, gate, ratchet) features its own parameters. Utilize the faders on the main UI to set the likelihood of each parameter being selected by the engine. Easily exclude parameters by assigning them a 0% chance, ensuring they never occur. For quick adjustments, employ the draw mode, 'All 0%' and 'All 100%' buttons on the bottom toolbar. When you press the play button in the standalone app or the AUv3 host app, MuseBud continuously generates notes. The looper records up to 64 notes in its buffer, enabling you to loop back a preferred section in the sequence. Set the start point and step count of the looper in the buffer. Pressing play on the looper stops generating new notes and begins looping the selected section. When you stop the looper, MuseBud resumes generating new notes. Toggle the record button on the looper off to prevent recording new notes into the buffer. Edit steps in the looper by simply tapping the desired step to delete or edit, and choose an action from the popup menu. In the step editor, modify properties assigned by the engine, such as note, duration, octave, velocity, gate length, and ratchet count. Generate various patterns for multiple generative sequences. Each pattern comes with its own looper buffer. When creating a new pattern, it automatically duplicates the current one, ensuring you can craft multiple loops without losing your randomization settings. - In the note mode, you'll have "Rest" (no note) and all the notes in the scale you are working. You can change the key/scale in the settings menu as well as with the BrainBud app. - Octaves could be between -1 and +9. - A note duration could be as long as 4-bars long or 1/64th note long. - Adjust velocity between 0-127. Use the fader grouping button at the bottom to filter faders for faster assignments. - Gate length can range from 0% to 100%. The fader grouping button is also available in gate mode for streamlined adjustments. - Ratchets can be between 1 (no ratchets), 2, 3 or 4 repeats. For optimal results, fine-tune the possibilities and consider excluding a few parameters for added precision. MuseBud is a MIDI app and does not generate sound on its own. To hear its output, route MuseBud's MIDI output to your audio app's MIDI input. The AUv3 plugin app requires an AUv3 host app, such as AUM, Loopy Pro, Logic Pro, Cubasis, Nanostudio, apeMatrix, and more.
Screenshots
Verdict
The clearest difference is update cadence: MuseBud at every 6 days against SpectrumGen's every 14 months. MuseBud also leads on review sentiment (100% vs 74%) and rating (4.7 vs 4.4). SpectrumGen's advantage is price ($0.99 vs $5.99). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
SpectrumGen costs $0.99 and MuseBud $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
MuseBud holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 10 and 12 respectively. Written reviews point the same way: 74% of SpectrumGen's written reviews are positive against 100% of MuseBud's.
SpectrumGen ships an update every 14 months, MuseBud every 6 days. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.
| Parameter | SpectrumGen | MuseBud |
|---|---|---|
| Price | $0.99 — better | $5.99 |
| Rating | 4.4 (10 ratings) | 4.7 (12 ratings) — better |
| Positive reviews | 73.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 10 | 12 — better |
| Update frequency | Every 14 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 3 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexander Zolotov | Cem Olcay |
Customer experience
SpectrumGen
MuseBud
In-app purchases
SpectrumGen
No in-app purchases
MuseBud
No in-app purchases









