Audio placement algorithm for determining playback delay

A computer-implemented method, comprising:

• sending, by a first component of a device to a second component of the device at a first time, an audio test signal, the audio test signal comprising at least a first audio sample having a positive peak value equal to or above a first threshold value and a second audio sample having a negative peak value equal to or below a second threshold value;
• sending, by the first component to the second component after the first time, one or more audio samples;
• detecting, by the second component at a second time, the audio test signal by detecting a third audio sample having a peak value above the first threshold value or below the second threshold value;
• determining, by the second component, a timestamp value corresponding to the second time;
• sending, by the second component to the first component, the timestamp value;
• determining, by the first component based on the timestamp value, a first number of the one or more audio samples sent between the first time and the second time;
• determining a second number of audio samples in an audio pipeline based on the first number of the one or more audio samples and a third number of audio samples included in the audio test signal;
• determining, by the first component, a third time at which to output a fourth audio sample, the fourth audio sample corresponding to a beginning of audio data;
• synchronizing, by the first component, the audio pipeline to the third time by adding at least one audio sample to the audio pipeline;
• and
• adding, by the first component, the fourth audio sample to the audio pipeline.

A device, comprising:

• at least one processor, including a first component and a second component;
• and
• memory including instructions operable to be executed by the at least one processor to perform a set of actions to cause the device to:
• send, by the first component to the second component at a first time, an audio test signal, the audio test signal comprising at least a first audio sample having a positive peak value equal to or above a first threshold value and a second audio sample having a negative peak value equal to or below a second threshold value;
• detect, by the second component at a second time, the audio test signal at an output of the audio pipeline by detecting a third audio sample having a peak value above the first threshold value or below the second threshold value;
• determine, by the second component, a timestamp value corresponding to the second time;
• send, by the second component to the first component, the timestamp value;
• determine, by the first component based on the timestamp value, a playback delay corresponding to a first difference between the first time and the second time;
• determine, by the first component, a third time at which to output a fourth audio sample, the fourth audio sample corresponding to a beginning of audio data;
• determine a second difference between a current time and the third time;
• determine a first number of audio samples corresponding to the second difference;
• determine a second number of audio samples currently in an audio pipeline to be output by a loudspeaker;
• determine that the first number of audio samples is greater than the second number of audio samples;
• synchronize, by the first component, the audio pipeline to the third time by removing at least one audio sample from the audio pipeline;
• and
• add, by the first component, the fourth audio sample to the audio pipeline.

A computer-implemented method, comprising:

• sending, by a first component of a device to a second component of the device at a first time, an audio test signal, the audio test signal comprising at least a first audio sample having a positive peak value equal to or above a first threshold value and a second audio sample having a negative peak value equal to or below a second threshold value;
• detecting, by the second component at a second time, the audio test signal by detecting a third audio sample having a peak value above the first threshold value or below the second threshold value;
• determining, by the second component, a timestamp value corresponding to the second time;
• sending, by the second component to the first component, the timestamp value;
• and
• determining, by the first component based on the timestamp value, a playback delay value corresponding to a difference between the first time and the second time;
• receiving first audio data;
• determining a frequency offset between the first component and a third component on a separate device;
• generating second audio data using the first audio data by one of:
• removing at least one sample of the first audio data per cycle based on the frequency offset,
• adding a duplicate copy of at least one sample of the first audio data to the first audio data per cycle based on the frequency offset, or
• interpolating between adjacent samples of the first audio data to either add or delete samples fractionally;
• and
• sending the second audio data to a loudspeaker.

A computer-implemented method, comprising:

• receiving, by an audio mixer of a device, a first audio sample having a positive peak value equal to or above a first threshold value;
• receiving, by the audio mixer, a second audio sample having a second peak value;
• determining a sum of the positive peak value and the second peak value;
• determining that the sum exceeds a saturation threshold;
• generating a third audio sample, a peak value of the third audio sample corresponding to the saturation threshold;
• sending, by a first component of the device to a second component of the device at a first time, an audio test signal, the audio test signal comprising at least the third audio sample and a fourth audio sample having a negative peak value equal to or below a second threshold value;
• detecting, by the second component at a second time, the audio test signal by detecting a fifth audio sample having a peak value above the first threshold value or below the second threshold value;
• determining, by the second component, a timestamp value corresponding to the second time;
• sending, by the second component to the first component, the timestamp value;
• and
• determining, by the first component based on the timestamp value, a playback delay value corresponding to a difference between the first time and the second time.