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Macでマイクを使うとAirPodsの音質が悪くなったりブツブツと途切れたりするときの原因と対処法

Mac で通話/録音ソフトなどを使用するとき AirPods を音声入力に指定している場合、ブツブツと途切れたり音質が悪くなったりすることがあります。これは音声入力を内蔵マイクに切り替えることで解決します。
※ 接続自体が切れる場合にはこの記事は該当しません。

追記:公式サポートページです: https://support.apple.com/ja-jp/HT208896

原因

普段は AirPods を使用して音楽などを聴く際には AAC コーデックが使用されますが、AirPods のマイクが動作するときには SCO コーデックというモノラル8kHzの低音質モードに切り替わってしまうそうです。
Apple はこの問題を認識していますが、いつ修正されるかはわかりません。

Apple claims that the poor Mono 8kHz quality which affects recording and indeed simultaneously playback on Mac when the AirPod microphones are activated, is because the SCO codec then gets employed over the entire Mac audio system. This is supposedly "expected behaviour" when trying to use the AirPods and other Bluetooth headsets together with a computer, according to Apple.

The AAC codec is normally used when just listening to playback on the AirPods. It's just very unfortunate that SCO – low-quality as it may be – upon AirPod microphone activation is not only limited to doing recording, but also displaces AAC and audio playback.

Apple Support claims that Apple is looking at this issue, and that improvements might be coming in future firmware updates, but I did not interpret that as a promise to be honest. But for the time being, I'd say that the benefits of making calls and so forth with AirPods on Macs are quite limited.

対処法

現時点では、音声入力には AirPods を使用せずに、内蔵マイクを使用するしか方法がありません。
音声入力を内蔵マイクに変更するには ⌥ Option キーを押しながらメニューバーの音量ボタンをクリックし、入力から「内蔵マイク」を選択します。出力は AirPods を選択します。

参考

AirPods: Extremely poor mic quality on Mac
https://apple.stackexchange.com/questions/282705/airpods-extremely-poor-mic-quality-on-mac

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