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  1. Qt
  2. QTBUG-44757

QAudioOutput volume is almost not audible

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Details

    • Bug
    • Resolution: Duplicate
    • P2: Important
    • None
    • 5.9.0 Beta 3
    • Multimedia
    • None
    • iOS 7, Qt 5.4.1, xCode 6.1
    • iOS/tvOS/watchOS

    Description

      When using QAudioOutput on iOS then the volume is hardly audible when played with the phone's speaker. The volume is ok when played on headphones.

      Sample code:

      QAudioFormat format;
format.setSampleRate(sampleRate);
format.setChannelCount(2);
format.setSampleSize(16);
format.setCodec("audio/pcm");
format.setByteOrder(QAudioFormat::LittleEndian);
format.setSampleType(QAudioFormat::SignedInt);

m_audioOutput = new QAudioOutput(format, this);
m_audioOutput->setNotifyInterval(10);
m_audioOutput->setVolume(1.0);

QFile* f = new QFile("sample.wav");
f->open(QFile::ReadOnly);
m_audioOutput->start(f);

      The same works fine on other systems such as Android, or Windows.

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            ylopes Yoann Lopes
            DanielSt Peter Staab
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            Dates

              Created:
              Updated:
              Resolved:

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