page_title: Gravis Ultrasound
section_title: UltraSound MAX
hierarchical_section_title: Gravis Ultrasound / Versions / UltraSound MAX
caption_attribution_description: English: Gravis Ultrasound MAX sound card
context_page_description: Gravis UltraSound or GUS is a sound card for the IBM PC compatible system platform, made by Canada-based Advanced Gravis Computer Technology Ltd. It was very popular in the demo scene during the 1990s.
  The Gravis UltraSound was notable at the time of its 1992 launch by providing the IBM PC platform with sample-based music synthesis technology, that is the ability to use real-world sound recordings rather than artificial computer-generated waveforms as the basis of a musical instrument. Samples of pianos or trumpets, for example, sound more like their real respective instruments. With up to 32 hardware audio channels, the GUS was notable for MIDI playback quality with a large set of instrument patches that could be stored in its own RAM.
  The cards were all manufactured on red PCBs, similar to fellow Canadian company ATI. They were only a little more expensive than Creative cards, undercutting many equivalent professional cards aimed at musicians by a huge margin.
context_section_description: Released in 1994, UltraSound Max is a version of GUS with CS4231 codec on board, 512 kB of RAM on board (upgradeable to 1024 kB with a single SOJ chip) and Panasonic/Sony/Mitsumi CD-ROM interface slots. CS4231 provides support for Windows Sound System specs, although the IO port range doesn't match the WSS hardware, and can be used for SoundBlaster emulation. The software CD includes a demo that featured "3D holographic sound" through the use of software HRTF filters.
caption: Gravis UltraSound MAX
exif: {"Image Make": "FUJIFILM", "Image Model": "FinePix F31fd", "Image Orientation": "Horizontal (normal)", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "ACD Systems Digital Imaging", "Image DateTime": "2007:12:06 20:43:52", "Image YCbCrPositioning": "Centered", "Image Copyright": "", "Image ExifOffset": "240", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail JPEGInterchangeFormat": "1316", "Thumbnail JPEGInterchangeFormatLength": "6381", "EXIF ExposureTime": "1/60", "EXIF FNumber": "5", "EXIF ExposureProgram": "Program Normal", "EXIF ISOSpeedRatings": "200", "EXIF ExifVersion": "0220", "EXIF DateTimeOriginal": "2007:12:06 19:52:01", "EXIF DateTimeDigitized": "2007:12:06 19:52:01", "EXIF ComponentsConfiguration": "YCbCr", "EXIF CompressedBitsPerPixel": "2", "EXIF ShutterSpeedValue": "6", "EXIF ApertureValue": "23/5", "EXIF BrightnessValue": "-7/50", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "3", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash fired, compulsory flash mode", "EXIF FocalLength": "8", "EXIF SubSecTime": "156", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "1809", "EXIF ExifImageLength": "776", "Interoperability InteroperabilityIndex": "R98", "Interoperability InteroperabilityVersion": "[48, 49, 48, 48]", "EXIF InteroperabilityOffset": "1228", "EXIF FocalPlaneXResolution": "2662", "EXIF FocalPlaneYResolution": "2662", "EXIF FocalPlaneResolutionUnit": "3", "EXIF SensingMethod": "One-chip color area", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF SceneCaptureType": "Standard", "EXIF Sharpness": "Normal", "EXIF SubjectDistanceRange": "0"}