£140

O7A Harpex Upsampler

The O7A Harpex Upsampler plugin converts first order ambisonic material (O1A) to seventh order (O7A) using the Harpex algorithm.

This allows recordings made with first order, four channel ambisonic microphones to be converted to high resolution, seventh order, 64 channel mixes which can then be sent to other O7A plugins such as the O7A Manipulators or O7A Decoding plugins.

The algorithm used is an "active" one which estimates the sound directions in the first order material and uses that to synthesise seventh order material.

CPU Load Warning

The O7A plugins are similar to the O3A plugins, except for the ambisonic "order" in use. The O3A plugins use third order and 16 audio channels to capture a scene, which already gives high spatial precision. The O7A plugins use seventh order and 64 audio channels, which gives much higher spatial precision but is generally only recommended for research applications, or in studios with high-end modern hardware.

This is a VST2 or AAX plugin for macOS (10.14 to 13.5) or Windows (10 or 11, 64bit Intel). It can be hosted in some Digital Audio Workstations (DAWs) that can handle tracks with sufficiently high channel counts. Because of the very high channel counts needed for these plugins, this typically means Reaper, Pro Tools Ultimate, or Max/MSP. This plugin uses the SN3D higher order ambisonic (HOA) convention, at seventh order, which needs 64 channels.

We use some free software, data and artwork in these products. Before purchase, please check the technical requirements and license agreement. Prices include VAT where applicable. EU VAT is normally charged at your local rate using the MOSS VAT system. By beginning the payment process you agree to be bound by our terms and conditions.