VA Impulse Response Generation and Observation

During the process of rendering audio stems, to visualise and observe the frequency response of various VAS models and placements of HRTF listener / sound sources, impulse responses have been rendered through for this purpose. Observing the frequency responses against one another will draw an insightful distinction between VAS models and their intrinsic timbre similarly to natural acoustic environments. Observing these impulse responses across frequency bands could inform decisions on placements and model choice for timbre of renders, for example if low-end / mid / higher-mids / top end bands are boosted particularly in one model this might be more suitable for different instrumentation placements. Along with this, the roll-off time and reflection cue response and behaviour should also be possible to be visualised in this way, which may impart additional insight to placements and arrangements.

Beginning with impulse responses generated through a static arrangement of listener and source (where the distance and angle between are the unchanging control variables), the differences in response here should be due to the varying placements within each differing VAS model. To elaborate, the impact here on the frequency response will be determined only by positioning such as nearer walls / floors / ceilings, and VAS model variables such as size and shape of the interior based on assigned virtual geometry architecture.

For static IRs, this arrangement as a whole has been moved around a number of positions in VAS models. Once the impulse responses had been recorded, they were then run through a spectrogram to visualise the waveforms. These can be observed to determine what spectral qualities were present across each VAS model, and inform creative and practical application in arrangement of sources, receiver and VAS model.