Playback device calibration based on representative spectral characteristics
A computing device may maintain a database of representative spectral characteristics. The computing device may also receive particular spectral data associated with a particular playback environment corresponding to the particular playback device. Based on the particular spectral data, the computing device may identify one of the representative spectral characteristics from the database that substantially matches the particular spectral data, and then identify, in the database, an audio processing algorithm based on a) the identified representative spectral characteristic and b) at least one characteristic of the particular playback device. The computing device may then transmit, to the particular playback device, data indicating the identified audio processing algorithm.
1 . A computing device comprising:
a network interface;
a microphone;
at least one processor;
a housing carrying the network interface, the microphone, and the at least one processor; and
at least one non-transitory computer-readable medium comprising program instructions that are executable by the at least one processor such that the computing device is configured to:
during playback of audio content by a playback device via at least one audio transducer in an environment, capture, via the microphone, microphone data representing at least a portion of the audio content played back by the playback device, wherein the microphone data: (1) includes audio in a first sub-range of a frequency range and a second sub-range of the frequency range and (2) excludes audio in one or more third sub-ranges of the frequency range, wherein the at least one audio transducer of the playback device is configured to reproduce audio over at least the frequency range;
determine spectral data based on portions of the captured microphone data in the first sub-range of the frequency range;
identify a stored audio processing algorithm corresponding to the determined spectral data, the identified audio processing algorithm at least partially offsetting acoustic characteristics of the environment across the frequency range, wherein the acoustic characteristics of the environment comprise at least one first acoustic characteristic within the second sub-range and at least one second acoustic characteristic within the one or more third sub-ranges; and
calibrate the playback device with the identified audio processing algorithm.
2 . The computing device of claim 1 , wherein the instructions that are executable by the at least one processor such that the computing device is configured to identify the stored audio processing algorithm comprise instructions that are executable by the at least one processor such that the computing device is configured to:
identify a particular spectral characteristic that approximates the environment based on the determined spectral data, and
identify, in a database, the stored audio processing algorithm based on the identified particular spectral characteristic.
3 . The computing device of claim 2 , wherein the database is stored in data storage of one or more servers, and wherein the instructions that are executable by the at least one processor such that the computing device is configured to identify the stored audio processing algorithm comprise instructions that are executable by the at least one processor such that the computing device is configured to:
query, via the network interface, the database for the stored audio processing algorithm including a database relation to the particular spectral characteristic.
4 . The computing device of claim 3 , wherein the instructions that are executable by the at least one processor such that the computing device is configured to query the database for the stored audio processing algorithm comprise instructions that are executable by the at least one processor such that the computing device is configured to:
query, via the network interface, the database for the stored audio processing algorithm including a database relation to (i) the particular spectral characteristic and (ii) a characteristic of the playback device.
5 . The computing device of claim 3 , wherein the program instructions that are executable by the at least one processor such that the computing device is configured to calibrate the playback device with the identified audio processing algorithm comprise program instructions that are executable by the at least one processor such that the computing device is configured to:
cause the one or more servers to send data representing the identified audio processing algorithm to the playback device.
6 . The computing device of claim 1 , wherein the instructions that are executable by the at least one processor such that the computing device is configured to determine spectral data based on portions of the captured microphone data in the first sub-range of the frequency range comprise instructions that are executable by the at least one processor such that the computing device is configured to:
determine, from the portions of the captured microphone data, a frequency response across the first sub-range of the frequency range.
7 . The computing device of claim 1 , wherein the microphone has a microphone response curve, and wherein the microphone response curve is sensitive to the first sub-range of the frequency range.
8 . The computing device of claim 1 , wherein the at least one non-transitory computer-readable medium further comprises program instructions that are executable by the at least one processor such that the computing device is configured to:
capture, via the microphone, additional microphone data representing (i) at least an additional portion of the audio content played back by the playback device and (ii) a voice input.
9 . The computing device of claim 1 , wherein the program instructions that are executable by the at least one processor such that the computing device is configured to calibrate the playback device with the identified audio processing algorithm comprise program instructions that are executable by the at least one processor such that the computing device is configured to:
send data representing the identified audio processing algorithm to the playback device.
10 . A system comprising:
a computing device comprising a microphone;
at least one processor; and
at least one non-transitory computer-readable medium comprising program instructions that are executable by the at least one processor such that the system is configured to:
during playback of audio content by a playback device via at least one audio transducer in an environment, capture, via the microphone, microphone data representing at least a portion of the audio content played back by the playback device, wherein the microphone data: (1) includes audio in a first sub-range of a frequency range and a second sub-range of the frequency range and (2) excludes audio in one or more third sub-ranges of the frequency range, wherein the at least one audio transducer of the playback device is configured to reproduce audio over at least the frequency range;
determine spectral data based on portions of the captured microphone data in the first sub-range of the frequency range;
identify a stored audio processing algorithm corresponding to the determined spectral data, the identified audio processing algorithm at least partially offsetting acoustic characteristics of the environment across the frequency range, wherein the acoustic characteristics of the environment comprise at least one first acoustic characteristic within the second sub-range and at least one second acoustic characteristic within the one or more third sub-ranges; and
calibrate the playback device with the identified audio processing algorithm.
11 . The system of claim 10 , wherein the instructions that are executable by the at least one processor such that the system is configured to identify the stored audio processing algorithm comprise instructions that are executable by the at least one processor such that the system is configured to:
identify a particular spectral characteristic that approximates the environment based on the determined spectral data, and
identify, in a database, the stored audio processing algorithm based on the identified particular spectral characteristic.
12 . The system of claim 11 , wherein the database is stored in data storage of one or more servers, and wherein the instructions that are executable by the at least one processor such that the system is configured to identify the stored audio processing algorithm comprise instructions that are executable by the at least one processor such that the system is configured to:
query, via a network interface, the database for the stored audio processing algorithm including a database relation to the particular spectral characteristic.
13 . The system of claim 12 , wherein the instructions that are executable by the at least one processor such that the system is configured to query the database for the stored audio processing algorithm comprise instructions that are executable by the at least one processor such that the system is configured to:
query, via the network interface, the database for the stored audio processing algorithm including a database relation to (i) the particular spectral characteristic and (ii) a characteristic of the playback device.
14 . The system of claim 12 , wherein the program instructions that are executable by the at least one processor such that the system is configured to calibrate the playback device with the identified audio processing algorithm comprise program instructions that are executable by the at least one processor such that the system is configured to:
cause the one or more servers to send data representing the identified audio processing algorithm to the playback device.
15 . The system of claim 10 , wherein the instructions that are executable by the at least one processor such that the system is configured to determine spectral data based on portions of the captured microphone data in the first sub-range of the frequency range comprise instructions that are executable by the at least one processor such that the system is configured to:
determine, from the portions of the captured microphone data, a frequency response across the first sub-range of the frequency range.
16 . The system of claim 10 , wherein the microphone has a microphone response curve, and wherein the microphone response curve is sensitive to the first sub-range of the frequency range.
17 . The system of claim 10 , wherein the at least one non-transitory computer-readable medium further comprises program instructions that are executable by the at least one processor such that the system is configured to:
capture, via the microphone, additional microphone data representing (i) at least an additional portion of the audio content played back by the playback device and (ii) a voice input.
18 . The system of claim 10 , wherein the program instructions that are executable by the at least one processor such that the system is configured to calibrate the playback device with the identified audio processing algorithm comprise program instructions that are executable by the at least one processor such that the system is configured to:
send data representing the identified audio processing algorithm to the playback device.
19 . At least one non-transitory computer-readable medium comprising program instructions that are executable by at least one processor such that a computing device is configured to:
during playback of audio content by a playback device via at least one audio transducer in an environment, capture, via a microphone, microphone data representing at least a portion of the audio content played back by the playback device, wherein the microphone data: (1) includes audio in a first sub-range of a frequency range and a second sub-range of the frequency range and (2) excludes audio in one or more third sub-ranges of the frequency range, wherein the at least one audio transducer of the playback device is configured to reproduce audio over at least the frequency range;
determine spectral data based on portions of the captured microphone data in the first sub-range of the frequency range;
identify a stored audio processing algorithm corresponding to the determined spectral data, the identified audio processing algorithm at least partially offsetting acoustic characteristics of the environment across the frequency range, wherein the acoustic characteristics of the environment comprise at least one first acoustic characteristic within the second sub-range and at least one second acoustic characteristic within the one or more third sub-ranges; and
calibrate the playback device with the identified audio processing algorithm.
20 . The at least one non-transitory computer-readable medium of claim 19 , wherein the instructions that are executable by the at least one processor such that the computing device is configured to identify the stored audio processing algorithm comprise instructions that are executable by the at least one processor such that the computing device is configured to:
identify a particular spectral characteristic that approximates the environment based on the determined spectral data, and
identify, in a database, the stored audio processing algorithm based on the identified particular spectral characteristic.