Keymap Surround

Surround + Space

When creating sample instruments, it is sometimes very useful to already pre-mix the individual zones or layers, so that the instrument is immediately usable in a musical context. While tweaking volume and pan already makes for interesting results, sometimes you need better, more realistic spatial control over placement of sounds in the soundfield. These days it’s also increasingly important to be able to spatialize sounds not just in the 2.0/stereo domain, but also in more complex speakers configurations as 4.0 or 5.0. The realtime Surround+Space editor in Keymap is the answer to these needs, and allows you to mix and render these spatial qualities to your samples so that the EXS24 or any other sampler can play the samples as we mixed and heard them in Keymap.

Two to five speakers into standard EXS format

The Surround+Space mixer has 16 stereo input busses coming from Zones, and the output can be configured for two, four or five speakers. When saving four or five speaker instruments to the EXS24 format, Keymap takes care of rendering and splitting samples so that you get standard multiout EXS instruments you can use anywhere.

Spatialization algorithms

Each stereo bus input has an individual input Volume control, a Stereo Width control and then enters the spatialization engine. Here, the Azimuth , Elevation and Distance parameters drive one of the five available spatialization algorithms.

• EqualPower: this algorithm is intended for 2.0 output and implements an simple equal power panner driven by the azimuth parameter. The elevation parameter is ignored by this algorithm.

• HRTF (Head-related transfer function) : this algorithm uses convolution to model of the human head, and filters the audio to simulate the diffraction and reflection properties of the head, pinna, and torso, before the sound reaches the eardrum and the inner ear. Biologically, the source-location-specific prefiltering effects of these external structures aid in the determination of source location, particularly the determination of source elevation. Thus, the HRTF is used to create the impression of surround sound without multiple speakers.

• Spherical Head: this algorithm is similar to HRTF, but uses a mathematical model instead of convolution.

• Soundfield: this algorithm takes the audio from the bus and distributes it amongst all the output channels with a weighting toward the location in which the sound derives. It is very effective for ambient sounds, which may derive from a specific location in space, yet should be heard through the listener's entire space.

• Vector: this algorithm is similar to Soundfield, but the sound is more focused to the output channels near the location in space of the sound source.

Logic 8 Integration
Instrument Editor
Group Editors
Setup Editor
Sample Editor
Harmonic Resynthesis
Resources Window
Surround+Space mixer
Batch Creator
Spectral Tuner
Keymap and Kontakt, Structure.

VAT ID IT02120380353