RULE id: ṣāḍava (25)
SOURCE: brihaddesi_sharma_1992 (vol_II_p018, vol_II_p020, vol_II_p023, vol_II_p027, vol_II_p028...)
SCOPE: svara_combination family, Brihaddesi (Mātaṅga ~750 CE)
CONCEPT: ṣāḍava
STATUS: canonical

RECORD:
  svara_count          = six svaras                      -- p.vol_II_p018
  variety_count        = forty-seven varieties           -- p.vol_II_p018
  classification_type  = चतुर्दशविधं                     -- p.vol_II_p018
  omitted_svaras       = षड्जहीनं                        -- p.vol_II_p023
  nyasa                = गान्धार                         -- p.vol_II_p023
  amsa_count           = Forty-seven                     -- p.vol_II_p027
  sparse_svara         = पञ्चम                           -- p.vol_II_p035
  samvadi_preservation = negation of the omission of the samvādī  -- p.vol_II_p027
  lakshana_count       = sevenfold                       -- p.vol_I_p038
  omitted_svaras       = ga                              -- p.vol_I_p042

ASSERTIONS:
  - [structural] A ṣāḍava structure consists of six svaras and is fourteenfold with forty-seven varieties
    -- p.vol_II_p018 "षर्स्वरं षाडवं चतुर्दशविधं सप्तचत्वारिंशत्प्रकारम्"
  - [definition] Ṣāḍava is a form created by omitting the niṣāda pitch
    -- p.vol_II_p020 "Its ṣāḍava (form) is (made) through (the omission of) niṣāda."
  - [structural] The ṣāḍava form of āndhrī is devoid of ṣaḍja and uses gāndhāra as nyāsa
    -- p.vol_II_p023 "षाडवं षड्जहीनं.स्यात्र्यासो गान्धार इष्यते"
  - [structural] Ṣāḍava formations involve omitting certain svaras while preserving the samvādī of the aṁśa
    -- p.vol_II_p027 "do not become ṣāḍava on account of (the omission of) ṛṣabha, on pañcama being the aṁśa, because of the negation of the omission of the samvādī"
  - [structural] Forty-seven aṁśas are to be applied in the formation of ṣāḍava
    -- p.vol_II_p027 "Forty-seven (svaras) are to be applied in the formation of ṣāḍava."
  - [structural] ṣāḍava is a formation that should be performed using specific svaras from the forty-seven remaining amsas
    -- p.vol_II_p028 "in the forty-seven anisas, the formation of ṣāḍava should be carried out with the said svaras."
  - [structural] Four jatis that are always complete and ṣāḍava together have twelve amsas that should be subtracted
    -- p.vol_II_p028 "out of fifty-four, twelve amsas of the four jātis that are always complete and ṣāḍava, should be subtracted."
  - [relation] Madhyamodicyavā, gāndhārapañcamī, kārmāravī, and ṣaḍjakaiśiki become non-ṣāḍava with specific svara combinations
    -- p.vol_II_p028 "Madhyamodicyavā (becomes non-ṣāḍava) with pa, similarly gāndhārapañcamī (and) kārmāravī (become non-ṣāḍava) with ri-pa-ni-dha (and ) ṣaḍjakaiśiki (becomes so) w"
  - [structural] Nine amsas belonging to four jatis that are always complete should be subtracted from sixty-three amsas
    -- p.vol_II_p028 "Out of sixty-three (anisas), nine amsas that pertain to the four jātis which are always complete, should be subtracted."
  - [definition] ṣāḍava is a pentatonic form (six-note scale minus one); certain aṁśas and jātis cannot produce ṣāḍava forms
    -- p.vol_II_p029 "when dhaivata is the aṁśa in ṣadjodīcyā there is no ṣāḍava (form) because of the non-omission of the samvādī."
  - [structural] When ṣāḍjī is sung as hexatonic, ṛṣabha becomes sparse and remaining svaras become abundant
    -- p.vol_II_p032 "When it (ṣāḍjī) is sung as hexatonic, then the sparseness of ṛṣabha has to be brought about, (and) there is abundance of the remaining svaras."
  - [structural] In the ṣāḍava state, pañcama has the property of sparseness
    -- p.vol_II_p035 "षाडवे पञ्चमस्यात्पत्वम्"
  - [enumeration] The collection of tānas devoid of single notes forms a category called sadava
    -- p.vol_I_p040 "Thus end the sadava [ tanas ]."
  - [structural] Sadava refers to a category of tanas that are devoid of ga (the note ga)
    -- p.vol_I_p042 "(Tānas) devoid of ga. [Thus end the sadava (tanas)]"
  - [enumeration] Sadava tanas are enumerated as seven distinct patterns with cyclical note sequences
    -- p.vol_I_p042 "म प ध नि स रि X X म प ध नि स रि ri X म प ध नि स स रि X म प ध नि नि स रि X म प ध ध नि स रि X म प प ध नि स रि X म"

CITED_RULES:
  - madhyamodīcyavā  (relation)
  - aṁśa  (definition)
  - aṁśa  (structural)
  - dhaivata  (definition)
  - gāndhāra  (structural)
  - gāndhārapañcamī  (relation)
  - hexatonic  (structural)
  - jāti  (definition)
  - jāti  (structural)
  - kārmāravī  (relation)
  - niṣāda  (definition)
  - nyāsa  (structural)
  - pañcama  (structural)
  - pentatonic  (definition)
  - samvādī  (definition)
  - samvādī  (structural)
  - svaras  (relation)
  - svaras  (structural)
  - tāna  (enumeration)
  - tāna  (structural)
  - āndhrī  (structural)
  - गान्धारस्य  (structural)
  - षाडवं  (structural)
  - ṛṣabha  (structural)
  - ṣadjodīcyā  (definition)
  - ṣāḍava rāga  (enumeration)
  - ṣāḍjī  (structural)

CONFIDENCE: canonical
PROTECT: true