Editing Gravis UltraSound (section)

== Versions ==
[[File:ultrasound classic.jpg|thumb|Gravis UltraSound (''Classic'')]]
[[File:Board16bit (cropped).png|thumb|16-bit recording daughterboard]]

=== UltraSound (Classic) ===
The first UltraSound was released in [http://www.gravisultrasound.com/files/UDD/volume_2/1993-01-19.TXT early October 1992], along with the [[Gravis PC GamePad]]. The Ultrasound was one of the first PC soundcards to feature 16-bit, {{nowrap|44.1 kHz}} stereo. The final revision (v3.74) of the GUS Classic features {{nowrap|256 [[Kilobyte|kB]]}} of onboard RAM (upgradeable to 1024 kB through [[Dual in-line package|DIP]] sockets), hardware analog [[sound card mixer|mixer]], and support for 16-bit recording through a separate [[daughterboard]] based on the [[Crystal Semiconductor]] CS4231 audio [[codec]].

====Reception====
''[[Computer Gaming World]]'' in 1993 criticized the UltraSound's Sound Blaster emulation and lack of native support in games, stating that "it is hard to recommend this card to anyone other than a ''Windows'' MIDI musician".<ref name="cgw199310">{{cite magazine | url=http://www.cgwmuseum.org/galleries/index.php?year=1993&pub=2&id=111 | title=CGW Sound Card Survey | magazine=Computer Gaming World | date=October 1993 | accessdate=26 March 2016 |author1=Weksler, Mike |author2=McGee, Joe | pages=76–83}}</ref>

===UltraSound MAX===
[[File:Gravis Ultrasound Max.jpg|thumb|Gravis UltraSound MAX]]
Released in 1994, UltraSound Max is a version of the GUS with a CS4231 codec on board, 512 kB of onboard RAM (upgradeable to 1024 kB with a single [[Small-outline integrated circuit|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 [[Head-related transfer function|HRTF]] filters.

[[Image:Gravis UltraSound PnP Pro V1.0.jpg|thumb|Gravis UltraSound PnP Pro]]

===UltraSound Plug & Play (PnP)===
Released in 1995, the Ultrasound Plug & Play was a new card based on AMD InterWave technology with a completely different sound set. Supposedly Synergy acted as the ODM-producer for it (as evidenced by their logo on the rear side of the card, although early and now very rare GUS PnP cards did not have the Synergy logo). The card features 1 MB of sound ROM, no onboard RAM (although it can be expanded to 8 MB with two 30-pin SIMMs), and an [[ATAPI]] CD-ROM interface. A 'Pro' version adds 512 kB of on-board RAM required for compatibility with the GUS Classic.
In 2014, a RAM adapter for the 72-pin SIMM was produced by [[retrocomputing|retro-computer]] enthusiasts that made it possible to install 16 MB of RAM on the 'Pro' version without any modifications to the card.

===UltraSound ACE (Audio Card Enhancer)===
[[File:Gravis UltraSound ACE.png|thumb|Gravis UltraSound ACE]]
Released in 1995, this budget version of UltraSound Classic has 512 kB of RAM (upgradable to 1024 kB, just as is the MAX), and has no game port or recording ability. Marketed as a competitor to [[Creative Wave Blaster|Wave Blaster]]-compatible cards, it is supposed to be installed alongside a [[Sound_Blaster#Second-generation_Sound_Blasters.2C_16-bit_ISA_.26_MCA_cards|SoundBlaster Pro]]/[[Sound_Blaster_16|16]] card as a sample-based synthesis (marketed as 'wavetable synthesis') upgrade. A prototype of this card was named "Sound Buddy".

===UltraSound CD3===
An [[OEM]] version of UltraSound Classic produced by Synergy, with {{nowrap|512 – 1024 kB}} of RAM. It features [[Industry Standard Architecture|AT-BUS]] CD-ROM interfaces following Sony, Mitsumi and MKE/Panasonic standards. This is the only Gravis sound card with a green [[circuit board]]  It is similar to a few card clones, including the Primax SoundStorm Wave (model Sound M-16B) and the AltraSound.

===UltraSound Extreme===
[[File:Gravis Ultrasound extreme.jpg|thumb|Gravis UltraSound Extreme]]
Released in 1996, the UltraSound Extreme is a 3rd party OEM system combining the UltraSound Classic with an [[ESS Technology|ESS]] AudioDrive ES1688 sound chip for [[Sound Blaster#Sound Blaster Pro, CT1330|Sound Blaster Pro]] and [[AdLib]] emulation. It was produced by Synergy as was the ViperMAX. It has 1&nbsp;MB RAM by default, but cannot be upgraded any further.

===UltraSound Clones and OEM cards===
All clones use the original Gravis GF1 or the AMD InterWave soundchip.

* '''Primax SoundStorm Wave''' (GF1) – there are two variants of cards from the well known scanner and mouse producer. Re-labeled Altrasound as Sound M-16B and different Sound M-16C with 4x CD-ROM Interfaces.
* '''D&B UltraWave''' (GF1) – this card has 512&nbsp;kB onboard RAM by default, upgradeable to 1024&nbsp;kB RAM using a 512&nbsp;kB [[Small-outline J-leaded package|SOJ]]-40 [[dynamic random access memory|DRAM]] chip. Has a DIP socket for a 16&nbsp;kB boot ROM (optional) and an [[integrated drive electronics|IDE]] interface (secondary).
* '''Synergy ViperMAX''' (GF1) – same card later repacked as UltraSound Extreme, but with only 512&nbsp;kB RAM on board.
* '''Expertcolor MED3201''' (InterWave LC) – probably the only card with cut-down variant of GFA1 chip - AM78C200 InterWave LC. First series was with standard Am78C201KC.
* '''Compaq Ultra-Sound 32''' (InterWave) – one of the last InterWave cards was designed for [[Compaq Presario]] desktops. Newer "C" revision of InterWave - AM78C201AKC and TEA6330T fader. Produced by [[STB Systems]].
* '''STB Systems Soundrage 32''' (InterWave) – standard InterWave card missing SIMM slots and IDE interface. There was "Pro" variant with 512 kB RAM. AM78C201KC chip.
* '''Core Dynamics DYNASonix 3D/PRO''' (InterWave) – features additional DSP chip that offered a graphic equalizer and additional sound FX presets.
* '''Philips PCA761AW''' (InterWave) – card design closely resembles the "AMD InterWave OEM Design" prototype. Has a footprint for 512kb RAM, often left unpopulated. AM78C201KC chip.
* '''Reveal WAVExtreme 32''' (InterWave) – AM78C201KC based design. Comes without RAM and has no sockets/footprints to add any.
* As of February 2015 there have been efforts by hobbyists to produce [http://www.vogons.org/viewtopic.php?f=46&t=42431 a new InterWave based UltraSound compatible soundcard] named '''ARGUS'''.
* '''PicoGUS''' ([[OpenSource]]) – Pico Pi ([[RP2040]]) based design started in 2022 by Ian Scott. Community support built up over the subsequent years. As of 2024 its emulation has similar compatibility to an original GUS. The PicoGUS also includes support for Tandy 3 Voice like the [[Tandy 1000]], Game Blaster / Sound Blaster 2.0 ([[Sound Blaster]]), and intelligent mode [[MPU-401]] support. <ref>{{cite web |url=https://github.com/polpo/picogus |title=Polpo/Picogus |website=[[GitHub]] }}</ref><ref>{{cite web |url=https://polpo.org/picogus/ |title=PicoGUS }}</ref>