MUSICAL FEATURES
Aurora is a spectral reverb for a wide palette of sounds, from icy shimmers to whale singing to extra-dimensional textures.From beautifully time-stretched reverb tails to cybernetic and metallic effects, Aurora gives you control over how far you want to be from reality, blurring these signals for cave-like reverberation and artificial spectra. To realize.Aurora's sound response, which is entirely dependent on the input signal, produces a different sound each time it is patched, which will evoke the inquisitiveness of a modular synth for the first time.
- Spectral reverb with true stereo audio inputs and outputs
- Phase vocoder audio engine operating at 48kHz, 24-bit
- Voltage-controlled reverb tail with time-stretchable, icy shimmer, and whale singing voice
- Equipped with a USB port on the front panel
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Daisy Audio PlatformAdopt
HOW TO USE
Spectral processing
Spectral processing is a method of decomposing and manipulating audio by frequency.This is achieved by using a phase vocoder to analyze the incoming signal, converting the result to the frequency domain, manipulating it, and converting it back to the time domain. Aurora has taken this technique into reverb-like effects, allowing unique musical tasks such as time stretch, frequency blurring, and harmonization to be controlled directly with knobs and CVs.
The most common method for creating a phase vocoder for audio applications is Fast Fourier Transformation (FFT) . FFT separates the time and pitch aspects of a single input signal, allowing for pitch modification without affecting the time element, and vice versa. Audio processing using FFT involves a trade-off between time and frequency resolution. This can be controlled by the 'FFT Size' parameter (Shift+Reverse), which is the number of samples per analysis/reconstruction phase. A larger FFT Size value results in a more accurate frequency response, while a smaller value results in a more accurate transient response.
Interface
The explanation of each part is displayed by mouse over
Shift Functions
By holding down the Shift button while operating Reverse, Freeze, and Mix, you can adjust the following secondary function parameters of Aurora.
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Shift + Mix --Input Level: Hold down Shift and operate the Mix knob to adjust the audio input level.You can adjust the sound source to be used to the optimum level for Aurora's internal configuration.
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Shift + Freeze --Reload USB Files: When this unit detects a change on the USB drive, it automatically updates its own configurable settings.Firmware updates are only performed at boot time.This allows you to replace the USB drive and change the configurable settings without power cycling the module.
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Shift + Reverse --FFT Size: You can switch between the four available FFT settings by holding down Shift and clicking the Reverse button repeatedly. The size of the FFT affects the timbre of acoustic characteristics, latency, and spectral effects.At the highest settings, you can get a fresh spectral modulation of clean pitch shifting in exchange for some additional latency.At the lowest settings, the latency is negligible and you can get a different dimension of timbre in the low resolution spectral field.Apply different sizing settings to the same sound to create a great variety of outputs, and different sounds to complement the FFT size in a unique way.The FFT size settings are also saved during the power cycle.
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Shift + Reverse, Hold 2sec --Factory Reset: Hold down the Shift button and press and hold the Reverse button for 2 seconds to reset Aurora to factory defaults. The FFT size is set to 4096, Reverse is disabled, the input level is set to XNUMXx, and each function is restored to the default setting.It also resets all "options.txt" parameters to non-destructive defaults. Settings from a USB drive can be reloaded using the Reload USB feature.
Configurable settings
Configurable settings are available via the "options.txt'" file in the USB drive.If the option is set to "1", it is valid, and if it is set to "0", the option is disabled.
To take advantage of the configurable options, follow these steps:
- Insert the Aurora USB drive into your computer.
- Open the options.txt file in your USB drive.
- Change the number adjacent to the setting to 1 or 0 and set it to any configuration.
- Save the options.txt file.
- Safely remove the USB drive and remove it from your computer.
- Insert the USB drive into Aurora.
- Aurora reads and updates the settings defined in the options.txt file. The LED at the top of the USB port turns white to indicate a successful update.
