如何在通话过程中在扬声器或麦克风中播放预先录制的声音..？
是否可以在通话过程中在扬声器或麦克风中播放预先录制的声音，以便其他方可以听到？
Is this possible to play a pre-recorded sound in speaker or mic during a call.. so that other party could hear it?
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请参阅在通读之前请先阅读此内容。调制解调器处理器直接从麦克风供电，并且由于应用程序和调制解调器处理器之间没有接线，恕我直言，您无法将预先录制的音频路由到另一端。
对方只能听到麦克风拾取的声音。因此，如果您在通话时通过扬声器播放预先录制的音频文件，并且声音足够大，麦克风就会拾取该音频，并且另一端也会听到该音频。不确定在这种情况下回声消除是否会通过消除扬声器中的音频而产生“不利”效果。
Please refer to this first before reading through. The modem processor directly feeds from the mic and since there is not wiring between the app and modem processor, IMHO you cannot route the pre-recorded audio to the other end.
The other party can hear only what the microphone picks up. So, if you play a pre-recorded audio file while in a call on the speaker, and it is loud enough, the mic will pick up the audio and it will be heard at the other end. Not sure if echo cancellation will have an "adverse" effect in this case by eliminating the audio from the speaker.