(sometimes capital) phonetics the voiceless velar fricative sound that is written as ch in Scottish loch or in German ach, often allophonic with the ich-lautSee also ich-laut
Deutsch: Aussprache Ach-Laut vs. K-Laut – YouTube
Ach, ich und die Kirschen (Teil 1) | Sprachlog
Ausspracheregeln im Deutschen: ch – ich-Laut versus ach-Laut – YouTube
The easiest way to pronounce the ich-Laut in German – YouTube