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Sampler/Sample Player Plugin by Jeskola
Free / Donationware
XS-1 by Jeskola is a Virtual Instrument Audio Plugin for Windows. It functions as a VST Plugin.
Sample Formats
Loads and/or Saves
SF2 (SoundFont), WAV
My KVR - Groups, Versions, & More
25 KVR members have added XS-1 to 6 My KVR groups 26 times.
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KVR Rank

Overall: 1361   1335

30-Day: 1390; 7-Day: 842; Yesterday: 890

XS-1 is a sample player that loads .XS1, .SF2 and .WAV (Full support for SoundFonts). It offers 16 parts and keyboard splits / part layering is possible.

Synthesis features:

  • Unlimited number of key/velocity zones per voice.
  • Volume and Modulation envelopes with attack, hold, decay, sustain, release key to hold and key to decay parameters. Modulation envelope can modulate pitch and filter cutoff.
  • Vibrato and Modulation LFOs with delay, frequency and depth parameters. Modulation envelope can modulate pitch, filter cutoff and volume.
  • 4 filter types: 12 and 24dB/oct lowpass, 12 and 24dB/oct highpass.
  • Reverb/Chorus send level.
  • High quality / extra high quality interpolation
  • Monophonic mode with retrig switch and portamento time control.
  • Tuning, volume, pan, key range, transpose, pitch wheel range controls for each part.
  • MIDI Velocity to volume, velocity to filter cutoff.
  • MIDI support: note on/off, sustain pedal, pitch bend, modulation wheel, channel volume.

Global settings:

  • Master volume, polyphony (max 1000), master tune.
  • Effects: Reverb, Chorus, Distortion.
  • Supported output samplerates: 44.1KHz, 48KHz, 88.2KHz, 96KHz.

Latest User Reviews

Average user rating of 4.29 from 7 reviews

Reviewed By dkistner
August 10, 2003

With the new R6 update to XS-1, I am in sampler heaven. The most important addition, for me, is that the midi channel I've selected for an instrument holds when I change to a different soundfount, rather than jumping back to a default setting like it did before. This makes it super-fast and easy to audition tons of different instruments to find just the right one. The samples load fast, and XS-1 responds well to real-time switching.

XS-1 is making it possible for me to realize the value of the 6,000 or so soundfonts I have acquired. Even some of those that I didn't think sounded very good can be made usable by tweaking the settings in XS-1.

I use XS-1 more than any other plugin, and it's paid for itself many times over. Great work, Oskari!Read Review

Reviewed By RWA
August 4, 2003

Reading the previous reviews made me purchase this thing...... and I'm not disappointed. Of course the sound depends heavily on the quality of the soundfounds but the XS-1 threads them perfectly!

GUI: not my style, but very simple and dead easy to use. And you can easy replace it by another GUI-design provided by Jeskola.

Features: excellent. I hate VSTi's with millions of features you never use much. XS-1 has all the main ones you actually use.

Documentation: no idea really... never had to use it.

Presets: it's been said before, it's what you put in yourself. But the starter-set on the Jeskola page is pretty good.

Customer support: never had to use it but Jeskola sends the updates automatically by E-mail. You don't have to think about it yourself! Excellent!

Value for money: price is hardly an issue, it's freakin' cheap!

Stability: rock solid. Never had any problems with it.

I've checked out several SF-players but this one is by far the best. No click or crackles or crashes or loadingproblems or whatever......
Go get it!Read Review

Reviewed By bobb
April 10, 2003

GUI: Well, it's not the most beautiful VSTi available, but it's very easy to use.

Sound: Great. Actually it sounds better than my VSampler (for soundfonts that is)

Docs: You dont need it.

Presets: Download free soundfonts from hammersound.net, or wherever.

Customer support: What can I say. I had to e-mail Oskari once when I bought the XS-1 and got my answer almost at once.

Value for Money: Hey, it's cheap.....

Stability: Never crashed...

All in all, this has to be the best Soundfont player available. It's easy on my humble CPU, and the release 3 can load 16 channels. Of course you can stack them all, or split, or why not a combination of stack and split.

If you need a soundfontplayer, you need this one. I use it in addition to VSampler, and it's a great combination.Read Review

Reviewed By venice
April 9, 2003

This is a one-hit wonder. And let me say I really love the focus of this VSTi. As other reviewers have noted, the vast selection of SF2 files now available make this product absolutely perfect.

I have never needed an owner's manual - I don't even know if one is supplied. It is really intuitive and stable. Clearly, a winning combination.Read Review

Reviewed By IvoryTickler
November 4, 2002

This is a great VST. Combine it with Vienna, and selected soundfonts from Hammer etc, and you have a huge amount of music making potential!

Version 2 now saves settings, allows a channel to be "emptied", and has a sort of mouse-over help.

Interface: Is OK. Workmanlike, some oddities - why an "M" button for the effects? I queried the "positive and negative" reverb send settings, but apparently this range is part of the soundfont spec. A list of all loaded presets on the main window would have been good.

Sound: Good! Great claims made on the website, and certainly better with sf2s than Kontakt (which has clicky loop points), sound quality close to Halion (which however drops notes too readily). This VST will bring out the best in your soundfonts!

Features: Fine. I don't use envelopes. The portamento is useful, as is the pitchbend range adjustment, and the keyboard sensitivity adjustment. (Sampletank doesn't have these features!) The distortion could use some warmth. The reverb is just OK, but I have Cubase SXs reverb anyway. I would have liked more than 4 presets, allowing its use as a single VST for a whole song.

Presets: this is a soundfont player. Can't really be marked down for a lack of presets.

Support has been fine (email).

Documentation is not really needed for a VSTi of this type - it does what it says on the screen. Command-line format conversion utility should be integrated with main VSTi.

It seems to be completely stable, has a low CPU use, and at this price is a STEAL. Get it.

Alan HopeRead Review

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Comments & Discussion for Jeskola XS-1

Discussion: Active
25 September 2013 at 6:05am

Hello is someone there that is using this app on 2013 ?

I just downloaded it but i need the manual to know the controllers list besides other things, if some one wants to share it i'll be thankfull,.

Althought Jescola XS1 is an old PC program it's very similar and maybe better than Bismark Bs-16i i've installed on my iPad on this year (2013)

I will try to learn to use it standalone with minihost (another old aplication) and thru Cakewalk Proaudio 9.

Je je je, I know all of these are Old programs but i know to use that Cakewalk and still play Live with.

my own Home Made Diy Keytar, that i love so much.

So if some one is interest in this project or can help me with the manual or the controller list.

we can share knowledege and material, Thanks.

We Can change the World by Change Ourselfs... To better please

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