Lines Matching full:warmup
1 page.title=Audio Warmup
27 <p>Audio warmup is the time for the audio amplifier circuit in your device to
29 to audio warmup time are power management and any "de-pop" logic to stabilize
33 <p>This document describes how to measure audio warmup time and possible ways to decrease
34 warmup time.</p>
36 <h2 id="measuringOutput">Measuring Output Warmup</h2>
39 AudioFlinger's FastMixer thread automatically measures output warmup
41 At warmup, FastMixer calls <code>write()</code>
43 FastMixer determines audio warmup by seeing how long a HAL <code>write()</code> takes to stabilize.
46 <p>To measure audio warmup, do the following
48 Warmup times are usually different for each output device and right after booting the device:</p>
56 <li>Run the following command to receive the measured warmup:
82 you will see a lower warmup time than the mean value.
87 <h2 id="measuringInput">Measuring Input Warmup</h2>
90 There are currently no tools provided for measuring audio input warmup.
91 However, input warmup time can be estimated by observing
97 <h2 id="reducing">Reducing Warmup Time</h2>
100 Warmup time can usually be reduced by a combination of:
104 <li>Performing independent warmup operations concurrently rather than sequentially</li>
109 need to tradeoff between low warmup time versus
