Introduction
SignatureDLY is a professional stereo delay effect designed as an AUv3 audio unit extension. Built for live performance and studio use, it delivers warm, musical echo with a filtered feedback loop and an intuitive rotary control interface.
The plugin runs inside any AUv3 compatible host application on iPhone and iPad, integrating directly into your audio processing chain with full preset and automation support.
10 ms – 2000 ms
Delay time range from tight slap-back to long ambient repeats.
Filtered Feedback
High Cut and Low Cut filters applied inside the feedback loop for tone shaping.
Rotary Interface
Five hardware-style knobs with professional graduation marks.
Zero Latency
Zero allocation and zero locks on the audio thread. Real-time safe.
Requirements
Minimum iOS: 16.0
Plugin format: AUv3 Audio Unit Extension (aufx)
Host app required: AU EngineCore or any AUv3 compatible host
Getting Started
SignatureDLY is a plugin, not a standalone application. To use it, you need an AUv3 host application installed on your device.
In AU EngineCore
NobodysBanda: SignatureDLY from the Effects category.In Other Hosts
In any AUv3 compatible host, look for SignatureDLY in the audio unit browser under the Effect category, manufacturer NobodysBanda.
Interface Overview
The SignatureDLY interface features five rotary knobs arranged in a single row. Each knob is surrounded by professional graduation marks with numeric labels showing key parameter values.
Signal Indicator
A green LED in the top-right corner of the header lights up whenever audio signal is present at the input. It responds to both dry and wet signal levels and provides instant visual confirmation that the plugin is receiving audio.
Knob Interaction
Graduation Marks
Each knob displays tick marks and numeric labels at key positions along its 270° travel arc. The colored arc fill shows the current value relative to the full range. A white dot on the chrome cap indicates the precise position.
Controls
SignatureDLY provides five controls covering all aspects of the delay effect.
Signal Path
Understanding the signal path helps you make informed decisions about how the controls interact.
Feedback Loop
The delayed signal is multiplied by the FEEDBACK value and added back to the delay line input on each cycle. The HIGH CUT and LOW CUT filters are applied within this loop, so each successive repeat is filtered once more — simulating the progressive tone degradation of analog hardware.
Dry/Wet Mix
The final output blends the unprocessed input (dry) with the output of the delay line (wet). This blend is a simple linear crossfade: output = (1 - wet) × input + wet × delayed.
Stereo Operation
SignatureDLY processes left and right channels independently with separate delay buffers and filter states. The delay time and feedback are identical on both channels, ensuring the stereo image remains coherent.
Presets & Automation
SignatureDLY integrates fully with the preset and automation systems of its host application.
Saving and Loading Presets
All five parameters are exposed as automatable AUv3 parameters. Any host that supports AUv3 preset saving can store and recall complete settings. In AU EngineCore, presets can be saved per-channel or as part of a session.
Preset Recall
When a preset is loaded — whether by user selection or by host automation — all five knobs update instantly and the audio engine reflects the new state within the next processing buffer. There is no click or discontinuity during preset transitions.
Automatable Parameters
Technical Specifications
| Plugin format | AUv3 — Audio Unit v3 Extension (aufx) |
| Manufacturer code | NbBa |
| Subtype | SDLY |
| Delay range | 10 ms – 2 000 ms |
| Max delay buffer | 2 seconds at 96 kHz (192 001 samples per channel) |
| Feedback range | 0% – 100% |
| Filter type | Biquad RBJ — Low Pass (High Cut) & High Pass (Low Cut), Direct Form II Transposed |
| Filter Q | 0.707 (Butterworth, fixed) |
| DSP precision | Double-precision (64-bit) filter state; single-precision delay buffer |
| Latency | Zero samples |
| Tail time | 2.0 seconds (reported to host) |
| Audio I/O | Stereo in, Stereo out |
| Thread safety | Atomic parameter updates; zero allocation on audio thread; zero locks |
| Minimum iOS | 16.0 |
| Supported devices | iPhone and iPad (Universal) |
Tips & Best Practices
Start with TIME, then dial in Feedback
Set the delay time first — it determines the rhythmic character of the effect. Then gradually raise FEEDBACK until the repeats feel musical. Stay below 70% to avoid runaway feedback buildup.
Use HIGH CUT for Analog Warmth
Lowering the HIGH CUT frequency (try 4–6 kHz) simulates the natural roll-off of tape and bucket-brigade devices. The repeats become progressively darker and sit behind the dry signal in the mix.
Keep LOW CUT Above 100 Hz
With high feedback values, low-frequency energy can accumulate in the delay loop and muddy the mix. Setting LOW CUT between 100 and 300 Hz prevents this without audibly affecting the character of the echoes.
Slap-Back in Under a Second
For rockabilly or vintage vocal slap-back, set TIME to 60–120 ms, FEEDBACK to 0%, and DRY/WET to 20–35%. The result is a single tight repeat that adds depth without clutter.
Double-Tap to Reset
Double-tap any knob to instantly return it to its default value. This is useful for A/B comparisons — reset a single parameter while keeping all others in place.
Stack with SignatureEQ
Insert SignatureEQ after SignatureDLY to shape the final wet signal. A gentle high-shelf cut above 10 kHz softens the repeats and integrates the effect seamlessly into a dense mix.
Support
SignatureDLY is developed and maintained by Antonio Sorin TASU under the #nobodysbanda brand.
Contact
Website: nobodysbanda.ro
When Reporting an Issue
Please include the following in your support request:
- Device model and iOS version
- Host application name and version
- Description of the issue and steps to reproduce it
- Whether the issue occurs consistently or intermittently