Pratisakhyas, collectively constituting four treatises, are works dealing with the phonetic aspects of the Sanskrit

Sanskrit

Sanskrit , is a historical Indo-Aryan language and the primary liturgical language of Hinduism, Jainism and Buddhism.Buddhism: besides Pali, see Buddhist Hybrid Sanskrit Today, it is listed as one of the 22 scheduled languages of India and is an official language of the state of Uttarakhand...

 language used in Vedas

Vedas

The Vedas are a large body of texts originating in ancient India. Composed in Vedic Sanskrit, the texts constitute the oldest layer of Sanskrit literature and the oldest scriptures of Hinduism....

. These works mainly pertain to euphonic permutation and combination of letters and special characteristics of their pronunciation as they prevailed in various schools of Vedic studies.

Rig Veda

One of the Pratisakhyas deal with the phonetic aspects of the Rig Veda. The work is generally ascribed to be written by Saunaka, an ancient rishi

Rishi

Rishi denotes the composers of Vedic hymns. However, according to post-Vedic tradition, the rishi is a "seer" to whom the Vedas were "originally revealed" through states of higher consciousness. The rishis were prominent when Vedic Hinduism took shape, as far back as some three thousand years...

 (sage). It has been translated into German

German language

German is a West Germanic language, related to and classified alongside English and Dutch. With an estimated 90 – 98 million native speakers, German is one of the world's major languages and is the most widely-spoken first language in the European Union....

 by Max Müller

Max Müller

Friedrich Max Müller , more regularly known as Max Müller, was a German philologist and Orientalist, one of the founders of the western academic field of Indian studies and the discipline of comparative religion...

. A French

French language

French is a Romance language spoken as a first language in France, the Romandy region in Switzerland, Wallonia and Brussels in Belgium, Monaco, the regions of Quebec and Acadia in Canada, and by various communities elsewhere. Second-language speakers of French are distributed throughout many parts...

 translation done by M. Regnier is also available.

Yajur Veda

There are two treatises dealing with phonetic and related aspects of the Yajur Veda. The first, commonly known as the Krishna (Black) Yajur, is known as Taittriya Pratisakhya. Its translation done by Professor Whitney is also available, and the same has been published in the Journal of the American Oriental Society

American Oriental Society

The American Oriental Society was chartered under the laws of Massachusetts on September 7, 1842. It is one of the oldest learned societies in America, and is the oldest devoted to a particular field of scholarship....

. The second treatise is commonly called the Shukla (White) Yajur, and is known as Vajasaneyi Pratisakhya. The later is believed to have been written by Katyayana. Its translation done by Weber is available.

Atharva Veda

The treatise pertaining to the phonetic and other aspects of Atharva Veda is also ascribed to the sage Saunaka, and derives its name from him: the Saunakiya Chaturadhyayika, which means the Book having four chapters by Saunak. Whitney has translated the work into English.

Sama Veda

Until now (2006), no Pratisakhya has been discovered dealing with the phonetic laws of Sama Veda.