I have seen the double marked Svarita or दीर्घ स्वरित only in some editions of the Taittirīya Saṃhitā. It is possible that the recitation of the Rigveda in South India follows this style.

Madhav M. Deshpande
Professor Emeritus, Sanskrit and Linguistics
University of Michigan, Ann Arbor, Michigan, USA
Senior Fellow, Oxford Center for Hindu Studies
Adjunct Professor, National Institute of Advanced Studies, Bangalore, India

[Residence: Campbell, California, USA]


On Sat, Nov 15, 2025 at 3:03 PM Harry Spier via INDOLOGY <indology@list.indology.info> wrote:
Dear list members,
I've been asked to provide a manuscript image of the ādigayatrī mantra from the ṛgveda that shows the accents. I can find images of accented Rgvedas online but they all have the accents anudatta and svarita. None I could find had the double svarita accent. All svarita accents were marked with the single svarita accent mark , a single vertical line.

But if you look at this video comparing the Shringeri, Kanchi and Varanasi styles of reciting the ādigayatrī mantra, 
https://www.youtube.com/watch?v=mQ2nYFnMiQk
At 1:37 it shows that the  ādigayatrī  mantra is pronounced with some double svarita accents. 
See below:
image.png

1) Do ṛgveda manuscripts (or any vedic manuscripts) exist that have the double svarita marked.  I had assumed this was the case because double svarita is in the  unicode vedic extensions block.

2) Do ṛgveda manuscripts in scripts other than devanagari mark the accent.

Many thanks,
Harry Spier

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