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5.0A2M detects the pitch of the audio and converts it into the corresponding MIDI notes in real time. Thanks to this, you can play, e.g., the guitar, saxophone, or even sing, and simultaneously trigger sounds in virtual instruments (not only AU). These acoustic (or electric) instruments, or your voice, act as a MIDI controller. A2M comes as an AU v3 plugin and as a standalone application (which is the AU host for this particular plugin). The A2M is quite an unusual Audio Unit – it is both an audio effect and a MIDI effect. Due to its characteristics, it is something in between. On the one hand, it analyzes the input sound, just like any audio effect. On the other hand, it generates output MIDI events, just like any MIDI effect. AU Hosts compatible with A2M Audio Unit: • Audiobus • AUM • apeMatrix A2M does not work as an AU plugin in GarageBand. The standalone version works with all MIDI-compatible applications, including GarageBand. The app sends MIDI events via the virtual MIDI port. The list of active and inactive MIDI ports is available in the application settings in the MIDI Settings → Outputs section. Parameters ⁍Host ▷ Audio input buffer size The smaller the buffer, the higher the CPU load and the lower the latency. A buffer less than 512 should only be set if you have a strong processor. For A2M standalone applications, the buffer size is available in the application settings under Audio Settings → Buffer Size ⁍Plugin ▷ Pitch recognition method A2M offers two popular algorithms • Based on autocorrelation, the beat bars proprietary method • FFT (with parabolic interpolation) ▷ Gate Threshold and Input Gain A2M works best when it only recognizes sounds at an appropriate volume level. In order to eliminate unnecessary background noises, select the appropriate value. ▷ Latency / Accuracy 2 dashes (default) – the best compromise between accuracy and latency. The higher the accuracy, the more of the CPU’s capacity is used and the longer the latency (as opposed to the audio buffer size settings). ▷ Velocity Gain It allows you to select the appropriate volume of the virtual instrument itself. Known limitations in the current version: • No polyphony • No pitch bending Requirements: • iOS 14 or later A2M - Audio to MIDI AUv3 • Live conversion • Two popular algorithms • Latency under control • Exceptionally accurate tracking • Simple to set up and use • Unique and innovative Try an unconventional way of creating music. It’s surprisingly easy!
