344 Sound Characteristics (R)

Indicators 1st -  Undefined
  2nd -  Undefined
Subfields _a Type of recording (R)
  _b  Recording medium (R)
  _c Playing speed (R)
  _d Groove characteristic (R)
  _e Track configuration (R)
  _f Tape configuration (R)
  _g Configuration of playback channels (R)
  _h Special playback characteristics (R)
  _0 Authority record control number or standard number (R)
  _2 Source (NR)
  _3 Materials specified (NR)
  _6 Linkage (NR)
  _8 Field link and sequence number (R)
Example
344 ## _adigital_boptical_gsurround_hDolby Digital 5.1_2rda
344 ## _adigital_gstereo_2rda
344 ## _aanalog_hDolby-B encoded_2rda