在“VOCAL（手控）”模式时通过音频模式旋按钮（PUSH AUDIO）的选择可调节高、低音，而选择其他声效时高、低音已设定，故不能再调节。
基于12个网页-相关网页
push-pull audio amplifier 推挽声频放大器 ; 声频推挽放大器
audio frequency push-pull amplifier 推挽式声频放大器
audio-frequency push-pull ampli-fier 推挽式声频放大器
push audio
把音频
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Analysts and proponents of the technology say it could be used to build apps that direct users to their gate at the airport, provide audio tours in museums or push offers to consumers based on where they are standing inside a store.
WSJ: Apple Buys Indoor GPS Specialist
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