Apparatus, method and computer program for providing sound reproduction

A method comprising:

• obtaining at least three ambient audio signals, wherein at least one of the at least three ambient audio signals is processed with a first directional transfer function pair and at least one other of the at least three ambient audio signals is to be processed with a second directional transfer function pair, wherein the first directional transfer function pair is based on a target direction for the at least one ambient audio signal and the second directional transfer function pair is based on a target direction for the at least one other ambient audio signal;
• determining a change of the target direction for the at least one ambient audio signal to an updated target direction;
• determining a magnitude of the change of the target direction, and wherein the magnitude is above a threshold, the first directional transfer function pair is changed, and wherein the magnitude is below the threshold, the first directional transfer function pair is not changed;
• selecting an updated directional transfer function pair associated with the updated target direction wherein the updated directional transfer function pair is selected from a plurality of directional transfer functions and the updated directional transfer function pair is better associated with the updated target direction than the first directional transfer function pair;
• determining whether the updated directional transfer function pair is different from the first directional transfer function pair;
• and
• based on a determination that the updated directional transfer function pair is at least partially different from the first directional transfer function pair, processing the at least one ambient audio signal with the selected updated directional transfer function pair and processing the at least one other ambient audio signal with the second directional transfer function pair.

An apparatus comprising:

• processing circuitry;
• and
• non-transitory memory circuitry including computer program code, the non-transitory memory circuitry and the computer program code configured to, with the processing circuitry, enable the apparatus to perform:
• obtaining at least three ambient audio signals, wherein at least one of the at least three ambient audio signals is processed with a first directional transfer function pair and at least one other of the at least three ambient audio signals is to be processed with a second directional transfer function pair, wherein the first directional transfer function pair is based on a target direction for the at least one ambient audio signal and the second directional transfer function pair is based on a target direction for the at least one other ambient audio signal;
• determining a change of the target direction for the at least one ambient audio signal to an updated target direction;
• selecting an updated directional transfer function pair associated with the updated target direction wherein the updated directional transfer function pair is selected from a plurality of directional transfer functions and the updated directional transfer function pair is better associated with the updated target direction than the first directional transfer function pair;
• determining whether the updated directional transfer function pair is different from the first directional transfer function pair;
• and
• based on a determination that the updated directional transfer function pair is at least partially different from the first directional transfer function pair, processing the at least one ambient audio signal with the selected updated directional transfer function pair and processing the at least one other ambient audio signal with the second directional transfer function pair, wherein the second directional transfer function pair which is used for the at least one other ambient audio signal is not updated.