Matrix Vocoder vs Let's GO MIDI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Matrix Vocoder
Transform your voice into an electronic instrument with this app, simulating classic analog vocoder sounds. It analyzes input signals, performs spectral analysis, and reassembles synthetic speech using filter banks and replacement signals.
- 32 channel filterbank with analog filters
- Stereophonic synthesis with alias-free oscillators
- External carrier input
- Voiced/Unvoiced detection and pitch tracking
- Formant shift
- Patchbay for channel connection
- 16 internal oscillators for choir sounds
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Matrix Vocoder transforms your voice into an electronic instrument! The Vocoder was invented by Homer Dudley in the mid-30's of the last century. Dudley worked at Bell Laboratories, and this is where the first Vocoder took shape. The Matrix Vocoder is designed to properly simulate the classic analog Vocoder sound made famous e.g. by the music of the german band Kraftwerk. At there last world tour they used in fact the PC version of our Matrix Vocoder on stage ! The epic Cylon Robot voice is The basic function of a Vocoder is characterised by an analysis of the input signal, usually speech but other type of inputs can also be very interesting. In a special filter bank, a spectral analysis is performed and signals are developed which follows the amount of spectral energy in each channel. Another part of the analyser tests if there are unvoiced or voiced sounds at any particular time and extracts the pitch of the voiced sounds. The output section of the vocoder consists of a stereophonic synthesis filter bank which assembles the new synthetic speech from the characteristic filter envelopes from the analysis stage together with an external or internal replacement signal. - 32 channel Filterbank with 8-pole Butterworth analog filters - Stereophonic synthesis with analog modelled alias free oscillators. - External carrier possible ( left channel = voice / right channel = carrier ) - Voiced/Unvoiced detection - Pitch tracking - Formant shift - Matrix uses patchbay to connect analysis and synthesis channels. - Pan position and level for each channel. - 16 internal oscillators with unlimited voices for choir like sounds. - Stereo wide panorama parameter for internal generator. - Optional monophonic generator with Glide setting. - Internal noise generator. - Effect AudioUnit and Music Effect AudioUnit - stand alone / Audiobus 3 / IAA
Let's GO MIDI
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Unlock the full potential of your Roland GO:KEYS 3 or 5 keyboard with Let’s GO MIDI — the ultimate patch librarian and playlist manager built specifically for musicians who play live. Browse, search, organize, and manage your keyboard tones for practice, songwriting, rehearsals, and live performance — all from your iPhone or iPad. Connect directly to your keyboard using USB or wirelessly using Bluetooth Low Energy (BLE) for a flexible and modern music workflow. Features USB & Bluetooth Connectivity * Connect directly to your GO:KEYS keyboard via USB * Wirelessly connect using Bluetooth Low Energy (BLE) * Manage tones and playlists from anywhere in your studio, practice space, or stage setup Browse Tone Categories Quickly explore tones by category including: * Piano * Electric Piano * Synth * Organ * Strings * Bass * Pads * And more Find the perfect sound faster with a clean and musician-friendly interface. Powerful Tone Search * Instantly search all tones by name * Quickly locate the exact patch you need * Ideal for live gigs and fast-paced rehearsals Tone Discovery with InstaTone * Discover new tones on your GO:KEYS keyboard * Let's GO MIDI randomly selects a tone from the entire library * If connected, Let's GO MIDI automatically sends it to the keyboard so you can preview it immediately Favorites * Save your favorite tones for quick access * Build your own personalized collection of go-to sounds * Spend less time navigating menus and more time playing Song Playlists * Create playlists for performances, gig sets, rehearsals, or practice sessions * Add songs and assign the keyboard tones used in each song * Keep your entire set organized and performance-ready Designed for Musicians * Clean, intuitive interface for iPhone and iPad * Built specifically for GO:KEYS keyboard owners * Fast workflow optimized for real-world music performance Whether you’re performing live, practicing at home, creating songs, or organizing setlists, Let’s Go MIDI helps keep your sounds organized and ready when inspiration strikes. Organize your tones. Build your playlists. Let’s GO MIDI. Privacy Policy https://interactivelogic.net/letsgomidi/privacy Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
The clearest difference is price: Let's GO MIDI at Free against Matrix Vocoder's $5.99. Let's GO MIDI also leads on update cadence (monthly vs every 15 months). Matrix Vocoder's advantage is in-app purchases (none vs 3) and iOS requirement (15.6 vs 26.2). On ads and device support 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
Let's GO MIDI is free to download; Matrix Vocoder costs $5.99 up front. Let's GO MIDI sells 3 in-app purchases, starting at $1.99 per month. Matrix Vocoder asks for nothing beyond the download.
Matrix Vocoder ships an update every 15 months, Let's GO MIDI monthly. Both last shipped on October 9, 2026.
| Parameter | Matrix Vocoder | Let's GO MIDI |
|---|---|---|
| Price | $5.99 | Free — better |
| Rating | 4.3 (20 ratings) — better | — |
| Positive reviews | 41.7% of reviews | — |
| Number of ratings | 20 — better | — |
| Update frequency | Every 15 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 26.2 |
| Further details — not scored | ||
| Size | 9 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Harry Gohs | Evan Stone |
In-app purchases
Matrix Vocoder
No in-app purchases
Let's GO MIDI
- Let's Go MIDI Pro Monthly$1.991 Month
- Let's Go MIDI Pro Annual$9.991 Year
- Let's Go MIDI Pro Lifetime$29.99









