Synthux Academy - Audrey II
Product number:
100064
Product information "Synthux Academy - Audrey II"
Horrorscape Synthesizer - sculpting feedback into sonic art!
Audrey II is a horrorscape synthesizer designed for fearless exploration of feedback. Unpredictable yet compelling, it transforms chaotic sound into immersive soundscapes. From deep, haunting drones to screeching, otherworldly tones, Audrey II is a sonic beast like no other.
Feedback Synthesis?
What is feedback, really? It’s that magical moment when sound loops on itself, evolving into something wild. With Audrey II, we’re taking feedback to the next level using Karplus-Strong synthesis—a fancy term for turning short bursts of noise into rich, self-sustaining tones. Think digital strings, but way cooler.
Digital Witchcraft
Some say analog is the only way to get that sound… We were surprised too when we heard the first burst of noise coming through our headphones. That warmth, the grit, the unpredictability—it was all there. But here’s the twist: Audrey II is 100% digital, running on the almighty Daisy Seed platform.
Built from the ground up to emulate analog chaos, digital bits power every nuance of Audrey II’s feedback, distortion, and reverb-drenched echoes. It’s pure digital magic that doesn’t just imitate analog—it embraces and amplifies it. What you hear isn’t just a close approximation; it’s a whole new breed of sound that pushes digital synthesis into uncharted territory.
Pristine Sound
Powered by the Daisy Seed microcontroller, Audrey II delivers 96kHz / 24-bit audio with the speed of an ARM Cortex-M7 at 480MHz. Equipped with 64MB of SDRAM, it handles complex feedback, drones, and effects seamlessly, pushing digital synthesis into rich, analog-like territory.
The Signal Flow
01. Karplus-Strong Synthesis & Distortion
The signal begins with Karplus-Strong synthesis, a method of string synthesis that creates resonant, droning tones—adding layers of harmonics to emulate organic vibrations, while feedback and distortion weave in raw, aggressive edges.
02. Reverb
Next, the signal passes through a rich, spacious reverb, allowing the drone and feedback to bloom, creating haunting and immersive atmospheres.
03. Filters
Following the reverb, Audrey II utilizes high-pass and low-pass filters with a body control to shape the sound further, revealing hidden overtones and harmonic textures that can add either warmth or an eerie sharpness to the feedback.
04. Tape Delay Emulation
Finally, the signal reaches a tape delay emulator that further degrades and expands the sound, adding layers of movement, modulation, and a classic tape echo feel that’s both nostalgic and unpredictable.
05. Stereo Output
To top it all off, Audrey II’s stereo output widens the soundstage, creating a sense of depth and space that immerses you in rich, layered textures. With stereo feedback flowing through the chain, each element takes on new dimensions, allowing you to push the boundaries of sonic space.
Driven & Open Source
Audrey II is a collaborative project born from the Synthux Academy community, where music technology enthusiasts, designers, and engineers come together to push creative boundaries. Developed by Nick Donadson from Infrasonic Audio and designed by Roey Tsemah, founder of Synthux Academy, Audrey II embodies the spirit of exploration and innovation that drives this community.
Audrey II’s firmware is available on our GitHub, inviting anyone to dive into the code, make modifications, or build upon its foundation. This open-source approach empowers makers not only to experiment with Audrey II’s sound but to shape its future, contribute enhancements, and share discoveries with the Synthux Academy community. Audrey II is a testament to the creativity that can emerge from collective knowledge and a shared passion for instrument design.
Features:
• Karplus Strong synth engine
• Reverb amount
• Reverb size
• High and low pass filters
• Tape delay emulation
• Stereo out
• Built on the Daisy Seed
• Open source
DIY-Kit-Type:
THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
Audrey II is a horrorscape synthesizer designed for fearless exploration of feedback. Unpredictable yet compelling, it transforms chaotic sound into immersive soundscapes. From deep, haunting drones to screeching, otherworldly tones, Audrey II is a sonic beast like no other.
Feedback Synthesis?
What is feedback, really? It’s that magical moment when sound loops on itself, evolving into something wild. With Audrey II, we’re taking feedback to the next level using Karplus-Strong synthesis—a fancy term for turning short bursts of noise into rich, self-sustaining tones. Think digital strings, but way cooler.
Digital Witchcraft
Some say analog is the only way to get that sound… We were surprised too when we heard the first burst of noise coming through our headphones. That warmth, the grit, the unpredictability—it was all there. But here’s the twist: Audrey II is 100% digital, running on the almighty Daisy Seed platform.
Built from the ground up to emulate analog chaos, digital bits power every nuance of Audrey II’s feedback, distortion, and reverb-drenched echoes. It’s pure digital magic that doesn’t just imitate analog—it embraces and amplifies it. What you hear isn’t just a close approximation; it’s a whole new breed of sound that pushes digital synthesis into uncharted territory.
Pristine Sound
Powered by the Daisy Seed microcontroller, Audrey II delivers 96kHz / 24-bit audio with the speed of an ARM Cortex-M7 at 480MHz. Equipped with 64MB of SDRAM, it handles complex feedback, drones, and effects seamlessly, pushing digital synthesis into rich, analog-like territory.
The Signal Flow
01. Karplus-Strong Synthesis & Distortion
The signal begins with Karplus-Strong synthesis, a method of string synthesis that creates resonant, droning tones—adding layers of harmonics to emulate organic vibrations, while feedback and distortion weave in raw, aggressive edges.
02. Reverb
Next, the signal passes through a rich, spacious reverb, allowing the drone and feedback to bloom, creating haunting and immersive atmospheres.
03. Filters
Following the reverb, Audrey II utilizes high-pass and low-pass filters with a body control to shape the sound further, revealing hidden overtones and harmonic textures that can add either warmth or an eerie sharpness to the feedback.
04. Tape Delay Emulation
Finally, the signal reaches a tape delay emulator that further degrades and expands the sound, adding layers of movement, modulation, and a classic tape echo feel that’s both nostalgic and unpredictable.
05. Stereo Output
To top it all off, Audrey II’s stereo output widens the soundstage, creating a sense of depth and space that immerses you in rich, layered textures. With stereo feedback flowing through the chain, each element takes on new dimensions, allowing you to push the boundaries of sonic space.
Driven & Open Source
Audrey II is a collaborative project born from the Synthux Academy community, where music technology enthusiasts, designers, and engineers come together to push creative boundaries. Developed by Nick Donadson from Infrasonic Audio and designed by Roey Tsemah, founder of Synthux Academy, Audrey II embodies the spirit of exploration and innovation that drives this community.
Audrey II’s firmware is available on our GitHub, inviting anyone to dive into the code, make modifications, or build upon its foundation. This open-source approach empowers makers not only to experiment with Audrey II’s sound but to shape its future, contribute enhancements, and share discoveries with the Synthux Academy community. Audrey II is a testament to the creativity that can emerge from collective knowledge and a shared passion for instrument design.
Features:
• Karplus Strong synth engine
• Reverb amount
• Reverb size
• High and low pass filters
• Tape delay emulation
• Stereo out
• Built on the Daisy Seed
• Open source
DIY-Kit-Type:
THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
| DIY Level: | Easy/Medium |
|---|---|
| Depth [mm]: | 129 |
| Height [mm]: | N/A |
| Power Input Type (pri.): | 5 Vdc / USB micro B |
| Width [mm]: | 213 |
| Panel / Color: | Black FR4 |
Manufacturer / Hersteller:
Stichting PTM Academy
Delftseplein 36
3013 AA Rotterdam
The Netherlands
hello@synthux.academy
Product Safety Information
Eurorack DIY Kits
Important Notice & Intended Use
Please read this safety guide before installation or use. This kit is intended for adult users experienced in electronics and modular synthesis. Assembly, including soldering, is required. Proper testing and installation are essential to ensure safe and functional operation. The completed module is intended for installation in a Eurorack-compatible synthesizer system powered by ±12V and +5V.
General Warnings
1. Electrical Hazards:
• Ensure the power supply matches the module’s specified voltage and current ratings (refer to the product manual). Incorrect voltage can damage the module and pose a safety risk.
• Never connect or disconnect the module while the Eurorack system is powered on.
• Wrong polarity can damage your module or system. Make sure the module is connected with correct polarity.
2. Heat Generation:
• The module may generate heat during operation. Ensure proper ventilation within your Eurorack case to prevent overheating.
3. Sharp Edges:
• The module’s faceplate and components may have sharp edges. Handle with care to avoid cuts or scratches.
4. Small Parts:
• Contains small parts that could cause a choking hazard. Keep away from children and pets.
5. Compatibility:
• This module is designed specifically for Eurorack-compatible systems. Connecting it to non-compatible systems may result in damage or malfunction.
Assembly Requirements
• Soldering skills are required to complete the module.
• Ensure a clean, well-lit and ventilated workspace free of flammable materials during assembly.
• Use appropriate tools and safety equipment, such as eye protection.
Testing
• Test the module thoroughly for shorts or incorrect assembly before powering it in your Eurorack system. When the unit has malfunctions due to incorrect assembly, the entire Eurorack system might be damaged. It's a good idea to test it in a separate case with only that single module.
• Use a multimeter or other appropriate tools to confirm proper functionality.
Installation and Use
• Mount securely in a Eurorack case using the provided screws.
• Use only the included or manufacturer-recommended power cable.
• Connect only when the power is off.
• Follow the module's user guide for instructions on operation. Do not exceed the input/output limits specified.
Responsibility
Users are solely responsible for proper assembly and testing. Contact manufacturer support for assistance if needed.
Environmental Safety
• Dispose of the module, its components, and packaging in accordance with local electronic waste regulations.
Liability Disclaimer
• The manufacturer or distributor is not responsible for any injury, damage, or malfunction resulting from improper installation, use, or modification of this product.
Contact Information
For further assistance, contact the manufacturer (you'll find the info under each product in our shop) or our shop support team at:
Tech Creation Lab Leipzig UG (haftungsbeschränkt)
Nonnenstrasse 19, 04229 Leipzig, Germany
support@exploding-shed.com
Stichting PTM Academy
Delftseplein 36
3013 AA Rotterdam
The Netherlands
hello@synthux.academy
Product Safety Information
Eurorack DIY Kits
Important Notice & Intended Use
Please read this safety guide before installation or use. This kit is intended for adult users experienced in electronics and modular synthesis. Assembly, including soldering, is required. Proper testing and installation are essential to ensure safe and functional operation. The completed module is intended for installation in a Eurorack-compatible synthesizer system powered by ±12V and +5V.
General Warnings
1. Electrical Hazards:
• Ensure the power supply matches the module’s specified voltage and current ratings (refer to the product manual). Incorrect voltage can damage the module and pose a safety risk.
• Never connect or disconnect the module while the Eurorack system is powered on.
• Wrong polarity can damage your module or system. Make sure the module is connected with correct polarity.
2. Heat Generation:
• The module may generate heat during operation. Ensure proper ventilation within your Eurorack case to prevent overheating.
3. Sharp Edges:
• The module’s faceplate and components may have sharp edges. Handle with care to avoid cuts or scratches.
4. Small Parts:
• Contains small parts that could cause a choking hazard. Keep away from children and pets.
5. Compatibility:
• This module is designed specifically for Eurorack-compatible systems. Connecting it to non-compatible systems may result in damage or malfunction.
Assembly Requirements
• Soldering skills are required to complete the module.
• Ensure a clean, well-lit and ventilated workspace free of flammable materials during assembly.
• Use appropriate tools and safety equipment, such as eye protection.
Testing
• Test the module thoroughly for shorts or incorrect assembly before powering it in your Eurorack system. When the unit has malfunctions due to incorrect assembly, the entire Eurorack system might be damaged. It's a good idea to test it in a separate case with only that single module.
• Use a multimeter or other appropriate tools to confirm proper functionality.
Installation and Use
• Mount securely in a Eurorack case using the provided screws.
• Use only the included or manufacturer-recommended power cable.
• Connect only when the power is off.
• Follow the module's user guide for instructions on operation. Do not exceed the input/output limits specified.
Responsibility
Users are solely responsible for proper assembly and testing. Contact manufacturer support for assistance if needed.
Environmental Safety
• Dispose of the module, its components, and packaging in accordance with local electronic waste regulations.
Liability Disclaimer
• The manufacturer or distributor is not responsible for any injury, damage, or malfunction resulting from improper installation, use, or modification of this product.
Contact Information
For further assistance, contact the manufacturer (you'll find the info under each product in our shop) or our shop support team at:
Tech Creation Lab Leipzig UG (haftungsbeschränkt)
Nonnenstrasse 19, 04229 Leipzig, Germany
support@exploding-shed.com
Manufacturer "Synthux Academy"
Synthux Academy is an educational nonprofit organization based in Rotterdam, The Netherlands. The Academy teaches sound design and how to program your musical instrument. Synthux DIY kits were created following six years of research at Design Academies around the world. The DIY kits were tested by thousands of students and teachers around the world who made their own unique twist to the instrument. Synthux Academy offers three DIY kits: Simple Fix Kit, Simple Touch Kit, and Simple Designer Kit. No prior technical knowledge is required to enjoy these powerful programmable musical instruments. The kits were designed to serve as your first synth DIY kit as well as a powerful tool for a more advanced creator. Each kit comes with a free video course teaching sound fundamentals. https://learn.synthux.academy/ For videos, live streams, and exclusive online courses, visit Synthux Academy on YouTube. https://www.youtube.com/c/synthuxacademy
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