structural:reformatting
Aspiration and breathy-voice

Most Indo-Aryan languages have contrastive aspiration (/ʈ/ ~ /ʈʰ/), and some retain historical breathy voice on voiced consonants (/ɖ/ ~ /ɖʱ/). Sometimes both phenomena are analysed as a single aspiration contrast. The places and manners of articulation which allow contrastive aspiration vary by language; e.g. Sindhi permits phonemic /mʱ/, but the phonemic status of this sound in Hindi is uncertain, and many "Dardic" languages lack aspirated retroflex sibilants despite having unaspirated equivalents.

In languages that have lost breathy-voice, the contrast has often been replaced with tone.