Next GDP-500 INFINITE FX: accordion Piano Attack Studio
New Launch Interactive accordion Piano StudioWelcome to the GDP-500 INFINITE FX
The GDP-500 INFINITE FX is a revolutionary virtual instrument that combines the powerful, majestic sound of a full brass ensemble with the expressive attack control of a piano. Whether you're a composer, producer, or beginner musician, this tool gives you professional-quality brass sounds with unprecedented control.
61-Key Brass Ensemble
Full 5-octave range with authentic brass samples - trumpets, trombones, and French horns combined!
25+ Professional Effects
Reverb, delay, chorus, EQ, and more - shape your brass sound like a pro studio.
Piano-Style Attack Control
NEW! Adjust attack time from 0-800ms - from sharp staccato to soft, swelling brass.
Built-in WAV Recorder
Capture your performances directly in your browser with full effects applied.
What Makes This Brass Instrument Special?
The Sound Formula
Every note you play goes through this powerful processing chain in real-time!
The GDP-500 uses high-quality brass ensemble samples - think of a full section of trumpets, trombones, and French horns playing together. What makes this instrument unique is the Attack Time control, which lets you shape how each note begins:
Attack Time Examples
0ms Attack (Sharp): Notes start instantly - perfect for staccato, fanfares, and rhythmic passages. Sounds like a punchy brass hit.
400ms Attack (Medium): Notes swell in gently - great for emotional melodies and cinematic backgrounds.
800ms Attack (Slow): Very gradual fade-in - creates ethereal, pad-like brass textures.
Getting Started: Quick Guide
1. Playing the Virtual Brass
You have two ways to play:
- Click or Touch: Simply click any key with your mouse, or tap on touchscreen devices.
- Computer Keyboard: Use your PC keyboard - each virtual key shows its corresponding computer key!
| Row | Keys |
|---|---|
| Top Row | Tab Q W E R T Y U I O P [ ] \ |
| Middle Row | A S D F G H J K L ; ' Enter |
| Bottom Row | Z X C V B N M , . / |
| Black Keys | F1-F12 1-0 - = |
Pro Tip: Try the Sustain Pedal
Press the SPACEBAR on your keyboard to toggle the sustain pedal. This makes notes ring longer - perfect for creating lush, cinematic brass swells!
Understanding the Controls
🔊 Volume (0-100%)
Controls the overall loudness. Start at 85% for comfortable listening.
🎵 Pitch Shift (-12 to +12 semitones)
Shifts all notes up or down in pitch. Great for matching other instruments or creating special effects.
⚡ Playback Speed (0.5x to 2.0x)
Changes how fast the sample plays. Lower speeds = deeper, longer sounds; higher speeds = brighter, shorter sounds.
🎹 Attack Time (0-800ms) - The Star Feature!
This controls how quickly each note reaches full volume:
- 0-100ms: Sharp, punchy brass - great for fanfares and staccato
- 100-300ms: Natural brass envelope - realistic ensemble playing
- 300-500ms: Swelling, emotional - perfect for ballads
- 500-800ms: Ethereal, pad-like - amazing for ambient music
Attack Time Formula
Volume at time t = Final Volume × (t / AttackTime) for t ≤ AttackTime
Example: With Attack Time = 400ms, after 200ms the volume is 50% of full. This creates that beautiful "swelling brass" effect!
The Effects Suite Explained
The GDP-500 comes with professional-grade effects. Here's what each one does:
Signature Brass Sound Recipe
Try this combination for epic cinematic brass:
Reverb Mix: 45% + Delay Mix: 25% (300ms) + Attack Time: 350ms
Play slow, swelling chords - sounds like a Hollywood film score!
The 10-Band Equalizer (EQ)
The EQ lets you shape the tone of your brass by boosting or cutting specific frequencies:
| Frequency | What It Controls | Brass Tip |
|---|---|---|
| 31-125 Hz | Bass / Low end | Boost slightly for more body and warmth |
| 250-500 Hz | Lower mids | Cut a bit to reduce "muddiness" |
| 1k-4k Hz | Midrange | Boost for presence and clarity |
| 8k-16k Hz | Treble / Air | Boost for brightness and "sheen" |
EQ Preset: Powerful Brass
Boost +3dB at 125Hz, Boost +4dB at 2kHz, Boost +2dB at 8kHz - creates a powerful, present brass sound that cuts through any mix!
Recording Your Music
Using the WAV Recorder
The built-in recorder captures everything - all effects, EQ, and attack shaping!
- [ RECORD ] - Start recording (button turns red)
- [ STOP ] - Stop recording
- [ PLAY ] - Listen to your recording
- [ SAVE ] - Download as WAV file
Recording Workflow
1. Set your Attack Time and Effects
2. Click [RECORD]
3. Play your melody or chords
4. Click [STOP]
5. Click [PLAY] to review
6. Click [SAVE] to download your masterpiece!
Transpose Feature
Transpose shifts all notes up or down without changing your finger position. This is incredibly useful for:
- Playing in different keys without learning new fingerings
- Matching the pitch of other instruments
- Creating special effects (extreme transposition creates unique sounds!)
Transpose Formula
Example: Press C key with Transpose +2 = You hear D!
15 Frequently Asked Questions
This uses real brass ensemble samples and has Attack Time control - you can shape how each note begins, from sharp staccato to soft swells. Regular pianos can't do that!
Attack Time controls how quickly a note reaches full volume. 0ms = instant (punchy). 800ms = slow fade-in (ethereal). This lets you create expressive, dynamic performances that sound like a real musician!
Yes! The GDP-500 is fully touch-responsive. Tap any key to play, and pinch-to-zoom to see all 61 keys.
Most browsers require a "user gesture" to enable audio. Simply click anywhere on the page or press any key to activate sound. Also check your device volume!
Pitch Shift changes the pitch of the sample itself (like speeding up a tape). Transpose changes which note you hear when pressing a key (like changing the instrument's key). Both affect pitch but in different ways.
Yes! The GDP-500 supports polyphony - hold down multiple keys to play chords. Great for creating rich brass ensemble textures!
Click the ⟳ RESET button next to each control. For a complete reset, refresh the page and click anywhere to re-enable audio.
Currently supports mouse/touch and computer keyboard. MIDI support is coming in a future update!
For fast, rhythmic passages, use 0-50ms Attack Time. This gives you sharp, articulate notes that don't blur together.
Set Attack Time to 300-500ms, add Reverb (mix 40-50%), and play slow, swelling chords. Sounds like a Hollywood film score!
This can happen with many notes or CPU-intensive effects. Try reducing active effects or closing other browser tabs.
Preset saving is coming soon! For now, take screenshots of your settings or use the WAV recorder to capture your performances.
The recorder can capture several minutes, depending on your browser's memory. Keep recordings under 5 minutes for best results.
Absolutely! No signup, no credit card, no hidden costs. Just open and play!
Yes! All music you create is yours to use however you like - YouTube, albums, commercials, anything. No royalties or credits required!
Learning Resources
New to brass? Start with simple melodies like "When the Saints Go Marching In" (C E F G A G F E C). Use Attack Time 0ms for a punchy, march-style sound!
Ready to Create Epic Brass Music?
Launch the GDP-500 INFINITE FX below and start your musical journey today!
Launch Interactive Brass Studio