File extension Details of NAP, GIG, GPK, G726, GSM, GSM, GP5, G723, NKI

Name:	NAP
File Type:	Napster Secured Music File
Popularity:	3
Category:	audio
File Description:	Copy-protected music file from Napster's subscription-based music download service; developed jointly by Napster and Playmedia Systems as a secure music format; protects music copyrights by limiting the systems on which each file can be played. NAP files are similar to .M4P files downloaded from the iTunes music store, but use a different encoding.
Open Programs:	Windows Microsoft Windows Media Player

Name:	GIG
File Type:	Tascam GigaSampler File
Popularity:	3
Category:	audio
File Description:	Sound sample format used by Tascam GigaSampler, a sampling program that produces realistic instrument voices and other sounds GigaSampler was discontinued and replaced with GigaStudio
Open Programs:	Windows Tascam GigaStudio

Name:	GPK
File Type:	WaveLab Audio Peak File
Popularity:	3
Category:	audio
File Description:	Contains a summary of sound wave data for an audio file opened with WaveLab; enables faster reloading of audio files in the program; created automatically when an audio file is opened in WaveLab. By default, WaveLab does not delete GPK files after they have been created; however, the program can be configured to automatically delete GPK files when the corresponding audio file is closed; to do this, select "Options->Preferences->File;" then select "Delete peak files when closing audio files."
Open Programs:	Windows Steinberg WaveLab

Name:	G726
File Type:	G.726 Audio File
Popularity:	3
Category:	audio
File Description:	Audio format that contains raw G.726 2, 3, 4, or 5-bit ADPCM (Adaptive Differential Pulse-Code Modulation) data; defined by the CCITT (International Telegraph and Telephone Consultative Committee).
Open Programs:	Mac OS libsndfile Windows Complete Audio Converter Lite AudioKit Allok Audio Convertor Sprintbit Software File Audio Processor libsndfile

Name:	GSM
File Type:	Global System for Mobile Audio File   (Most common)
Popularity:	3
Category:	audio
File Description:	Audio format designed for telephony use in Europe; optimized for recording vocal audio, such as a telephone conversation
Open Programs:	Mac OS NCH Switch Sound Format Converter Apple QuickTime Player 5 or later Windows NCH Switch Sound Format Converter Apple QuickTime Player 5 or later

Name:	GSM
File Type:	US Robotics GSM Audio File
Popularity:	3
Category:	audio
File Description:	Audio format used to transfer voice over a modem; used by the GSM QuickLink, VoiceGuide, and RapidComm models; sometimes used for audio faxes
Open Programs:	Mac OS j2 Global Communications eFax Messenger Windows j2 Global Communications eFax Messenger

Name:	GP5
File Type:	Guitar Pro 5 Tablature File
Popularity:	3
Category:	audio
File Description:	Guitar tab file created with Guitar Pro 5; can be used to save musical scores or compositions for the guitar, bass, or banjo; scores can be used to play back guitar sounds, but GP5 files do not contain actual audio data. Unlike previous versions of Guitar Pro, Guitar Pro 5 is available for both the Macintosh and Windows platforms.
Open Programs:	Mac OS Arobas Music Guitar Pro 5 Windows Arobas Music Guitar Pro 5

Name:	G723
File Type:	G.723 Audio File
Popularity:	3
Category:	audio
File Description:	Audio format that contains raw G.723 5-bit ADPCM (Adaptive Differential Pulse-Code Modulation) data; defined by the CCITT (International Telegraph and Telephone Consultative Committee)
Open Programs:	Mac OS libsndfile Windows Complete Audio Converter Lite AudioKit Allok Audio Convertor Sprintbit Software File Audio Processor libsndfile

Name:	NKI
File Type:	KONTAKT Instrument File
Popularity:	3
Category:	audio
File Description:	Software instrument format used by Native Instruments' KONTAKT, a professional sampling program; contains samples of instruments or other sounds that can be played back via MIDI data.
Open Programs:	Mac OS Native Instruments KONTAKT Windows Native Instruments KONTAKT

Name:	NSF
File Type:	NES Sound Format File
Popularity:	3
Category:	audio
File Description:	Music file from an original Nintendo (NES/Famicom) game; allows music from Nintendo games to be played without loading the actual game; can be opened by a variety of NSF players.
Open Programs:	Mac OS Audio Overload Windows DeliPlayer VirtuaNSF G-NSF Festalon Audio Overload Nosefart Nullsoft Winamp with NEZPlug, NSFten, or Bleep! plugins Linux Audio Overload Nosefart for Unix XMMS with nsf-xmms plugin