site_archiver@lists.apple.com Delivered-To: bluetooth-dev@lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=radsone-com.20150623.gappssmtp.com; s=20150623; h=mime-version:subject:from:in-reply-to:date:cc:message-id:references :to; bh=xNNf/0C93n2oTs9fSSk7rmJUQlbnMILu3c7Enk2s82s=; b=IhgwKW51SIgTUQtrcCI7T62aCLKom08r/5XO2fJjdEQpEpHRZU2SZCtnSIu6pzhkx7 q6hGYYsJ7fB1Dra1t8w4HBi+i/v0TCM2dNp1w/6wYk7ULXsGEZlMbMPUFWWNWNTGMmAA mslwbUheWAi65CO21W0fusXqPOQHmz6c0P6M8XxC2YyJ36la0Y410uChCPuXvL6+mcWo OaIxtmqi9U1NBxf0UwizC8Aj+pSI9lb51a95RTKvzC/+bGav69SIiSOBbCraG8dA430h zcmFqD9rZRkOg1d6z24jhYTbbkgtj4eFRE6KRbFchuy2MAMiC7ZEBFGAGRnl/8APr0fl zTRw== What I mentioned is the generic voice call, not a voip application. It’s just support 8KHz Narrow Band Speech over Bluetooth, even with Apple airPod.

On 1 Nov 2018, at 12:31 PM, yinweixu <yinweixu@movnow.com> wrote:

[AVAudioSession.sharedInstance setCategory:AVAudioSessionCategoryPlayAndRecord withOptions:AVAudioSessionCategoryOptionMixWithOthers | AVAudioSessionCategoryOptionAllowBluetooth error:nil]; [AVAudioSession.sharedInstance setMode:AVAudioSessionModeDefault error:nil]; [AVAudioSession.sharedInstance setActive:YES error:nil];

------------------ Original ------------------ From: "Woo-Suk Lee"; Date: 2018年11月1日(星期四) 中午11:07 To: "bluetooth-dev"; Subject: Re: iOS Bluetooth HFP speech codec bandwidth

Hello,

It seems that the latest iOS doesn’t support wide band speech codec over Bluetooth HFP.

As I tested airPod and other Bluetooth headset supporting HFP1.6 wide band speech codec with the test setup below,

airPod or BT receiver —> iOS —> voice call —> Android (Galaxy S8) —> Voice call recording

It just shows the narrow band speech, which has signals over 20~3KHz only.

And the two test setup below show the same result with the full 7KHz bandwidth.

iPhone built-in mic —> iOS —> voice call —> Android (Galaxy S8) —> Voice call recording

BT receiver —> Android(Galaxy S8) —> voice call —> Android (Galaxy S8) —> Voice call recording

It seems the current iOS doesn’t support Wideband Voice Codec over Bluetooth HFP. Anyone exeriencing the same issue?

Thanks!

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