Practice multi-part songs alone. Control the volume of each part separately, so you can:* Listen to
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My John Hancock
“My John Hancock” is an iOS (iPhone, iPad) agreement-signing app. Currently, it is only intended for
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Practice multi-part songs alone. Control the volume of each part separately, so you can:* Listen to
看更多 »“My John Hancock” is an iOS (iPhone, iPad) agreement-signing app. Currently, it is only intended for
看更多 »