Dynamic device speaker tuning for echo control

A method of dynamic device speaker tuning for echo control, the method comprising:

• detecting audio rendering from a speaker on a device;
• based at least on detecting the audio rendering, capturing, with a microphone on the device, an echo of the rendered audio;
• performing a Fourier Transform (FT) on the echo and performing an FT on the rendered audio;
• determining, based at least on the FT of the echo and the FT of the rendered audio, a real-time transfer function, wherein the real-time transfer function includes at least one signature band;
• determining a difference between the real-time transfer function and a reference transfer function;
• and
• tuning the speaker for audio rendering, based at least on the difference between the real-time transfer function and the reference transfer function, by adjusting an audio amplifier equalization.

One or more computer storage devices having computer-executable instructions stored thereon for dynamic device speaker tuning for echo control, which, on execution by a computer, cause the computer to perform operations comprising:

• detecting audio rendering from a speaker on a device;
• based at least on detecting the audio rendering, capturing, with a microphone on the device, an echo of the rendered audio, wherein capturing the echo comprises:
• capturing the echo during a first time interval within a second time interval, wherein the second time interval is longer than the first time interval;
• and
• repeating the capturing at completion of each second interval while the audio rendering is ongoing;
• aligning the echo with a copy of the rendered audio;
• performing a Fourier Transform (FT) on the echo and performing an FT on the rendered audio;
• determining, based at least on the FT of the echo and the FT of the rendered audio, a real-time transfer function, wherein determining the real-time transfer function comprises dividing a magnitude of the FT of the echo by the magnitude FT of the rendered audio, and wherein the real-time transfer function includes at least one signature band, and wherein the signature band comprises a signature band for a wall echo;
• determining a difference between the real-time transfer function and a reference transfer function;
• and
• tuning the speaker for audio rendering, based at least on the difference between the real-time transfer function and the reference transfer function, by adjusting an audio amplifier equalization.