# DeepBass sampleset has high latency and I'd like to fix it

**URL:** <https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848>\
**Category:** Development\
**Tags:** issue, sfz\
**Created:** [February 21, 2026, 5:49pm UTC](https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848 "2026-02-21T17:49:04Z")\
**Posts on this page:** 13\
**Page:** 1

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**Author:** ![jlearman](https://discourse.zynthian.org/letter_avatar_proxy/v4/letter/j/a698b9/32.png) [@jlearman](https://discourse.zynthian.org/u/jlearman)\
**Post date:** [February 21, 2026, 5:49pm UTC](https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848/1 "2026-02-21T17:49:04Z")

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The DeepBass sfz sampleset has high latency (from 20 to 70 msec!!!) baked into the samples. The result is musically unusuable, live. (In a recording you could compensate, but it’s difficult due to the huge variation in latency.)

Just for reference, back in the early 2000’s I played with constant 20ms latency and managed it but didn’t like it. Were I a tighter musician I probably couldn’t have tolerated it. Latencies under 10ms are fine for most folks, but people expect under 5 ms these days. Zynthian on my Pi4 has only a little more than that, as far as I can tell (way good enough for me.) The latency I’m reporting above is in addition to any latency in the Zynthian system, Linux audio, and hardware. So, it’s really quite bad.

I can fix it and I’d be happy to, but I can’t find the source for the samples.

Please advise.

BTW, I’m the creator of the stereo Rhodes sampleset that’s included with Zynthian. I plan to make a few fixes to that as well, but haven’t figured out how open-source samplesets are pulled into Zynthian.

PS: I’m having a blast playing with Zynthian. What a totally cool project!

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**Author:** ![HansR](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/hansr/32/15102_2.png) [@HansR](https://discourse.zynthian.org/u/HansR)\
**Post date:** [February 21, 2026, 7:08pm UTC](https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848/2 "2026-02-21T19:08:08Z")

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Hi @jlearman ,

> [@jlearman](#):
>
> The DeepBass sfz sampleset

You mean [this one](https://musical-artifacts.com/artifacts/135)?

These samples are preceded by a short silence:

 ![image](https://discourse.zynthian.org/uploads/default/original/2X/8/8f9c4826bbb8c25e48206fbdb37584c174722f77.png)

> [@jlearman](#):
>
> I can’t find the source for the samples

You don’t need any sources to repair that.

You can use any wave editor (I use [GoldWave](https://goldwave.com/)) to remove the silence in the .wav file itself.

Kind regards,  
Hans.

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**Author:** ![hannesmenzel](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/hannesmenzel/32/13014_2.png) [@hannesmenzel](https://discourse.zynthian.org/u/hannesmenzel)\
**Post date:** [February 21, 2026, 8:13pm UTC](https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848/3 "2026-02-21T20:13:13Z")

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> [@jlearman](#):
>
> BTW, I’m the creator of the stereo Rhodes sampleset that’s included with Zynthian. I plan to make a few fixes to that as well, but haven’t figured out how open-source samplesets are pulled into Zynthian.

Hi, great you’re here in the community. Your rhodes sample set was and still is among my favorite keys samples.

So it is also unlikely you’re asking for help regarding sfz scripting, and you might be familiar with the offset-opcode.

> [@jlearman](#):
>
> I can fix it and I’d be happy to, but I can’t find the source for the samples.

I’m not really sure I understand the question, but the Deep Bass samples can be found were the “factory sample sets” of zynthian are stored, which is

```auto
/zynthian/zynthian-data/soundfonts/sfz/Bass/DeepBass

```

But if you want to edit these samples you might want to copy them to the user soundfont directory, which is

```auto
/zynthian/zynthian-my-data/soundfonts/sfz/[...]

```

But if you edit a previously unusable soundfont the main devs might be happy to include it to the main image.

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**Author:** ![jlearman](https://discourse.zynthian.org/letter_avatar_proxy/v4/letter/j/a698b9/32.png) [@jlearman](https://discourse.zynthian.org/u/jlearman)\
**Post date:** [February 21, 2026, 9:02pm UTC](https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848/4 "2026-02-21T21:02:42Z")

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I want to fix Zynthian for everyone, not just me.

Where are the original sources in a Gitub repo?

I don’t know why my screenshot didn’t appear. Yes, that’s one of the files. And thanks for the kind words!

BTW, using sfz sample offset can cause clicks, even if you pick a zero crossing, so I always trim the start and then fade in the first msec. My tool for creating samplesets does this automatically during the sample chopping process.

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**Author:** ![hannesmenzel](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/hannesmenzel/32/13014_2.png) [@hannesmenzel](https://discourse.zynthian.org/u/hannesmenzel)\
**Post date:** [February 21, 2026, 9:06pm UTC](https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848/5 "2026-02-21T21:06:12Z")

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> [@jlearman](#):
>
> Where are the original sources in a Gitub repo?

Ah, I see. I don’t think there is a repository for these. I think it is manually included in the OS image ([Index of /files/soundfonts/sfz/Bass](https://os.zynthian.org/files/soundfonts/sfz/Bass/)), so I think the current way would be messaging @jofemodo for manually including them I think.

> [@jlearman](#):
>
> BTW, using sfz sample offset can cause clicks, even if you pick a zero crossing, so I always trim the start and then fade in the first msec. My tool for creating samplesets does this automatically during the sample chopping process.

Seems like a great tool you have there! I solve the click with the offset parameter by limiting the ampeg\_attack to a minimum of 0.001, so an artificial zero crossing if you want.

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<div class="post-metadata">

**Author:** ![jlearman](https://discourse.zynthian.org/letter_avatar_proxy/v4/letter/j/a698b9/32.png) [@jlearman](https://discourse.zynthian.org/u/jlearman)\
**Post date:** [February 21, 2026, 9:13pm UTC](https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848/6 "2026-02-21T21:13:41Z")

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OK thanks. Good point, that should fix any tiny clicks, and good editing avoids any big ones.

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**Author:** ![hannesmenzel](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/hannesmenzel/32/13014_2.png) [@hannesmenzel](https://discourse.zynthian.org/u/hannesmenzel)\
**Post date:** [February 21, 2026, 9:29pm UTC](https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848/7 "2026-02-21T21:29:51Z")

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I don’t know exactly how the sample sets were chosen, but the stereo rhodes in zynthian seems to be a non-altered version of [this here](http://www.bandshed.net/sounds/sfz/).

But on my personal machine I do use [your samples](https://github.com/sfzinstruments/jlearman.jRhodes3d) and I do prefer them 😉

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**Author:** ![ToFF](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/toff/32/5532_2.png) [@ToFF](https://discourse.zynthian.org/u/ToFF)\
**Post date:** [February 21, 2026, 9:34pm UTC](https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848/8 "2026-02-21T21:34:09Z")

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ChatGPT about DeepBass sfz:

### Who created it / where it comes from

DeepBass is part of the “NBO” library, which was maintained and released on the LinuxMusicians forum by the user **j\_e\_f\_f\_g**. In the library’s “contents” description, it is explicitly listed as **“Deep stereo fender precision sound.”**

In the “NBO version 2” thread, you can see that **deepbass.zip** used to be one of the older standalone packs and was later marked as **obsolete** , replaced by the complete **nbo\_2.zip** bundle.

The repository’s license notes that the **original waveforms were created by Mihai Sorohan** , and it prohibits using them for the **commercial sale of sample libraries**. [GitHub - ssj71/No-Budget-Orchestra: (Deprecated) Fork of the NBO for various fixes to the sfz files. See the original for the samples (http://www.bandshed.net/sounds/sfz/)](https://github.com/ssj71/No-Budget-Orchestra)

Also, the GitHub repository is described as a fork intended for **SFZ fixes** , and it points back to the **original source that hosts the WAV files**. The original WAV samples can be found here: [Index of /sounds/sfz](https://www.bandshed.net/sounds/sfz/)

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<div class="post-metadata">

**Author:** ![ToFF](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/toff/32/5532_2.png) [@ToFF](https://discourse.zynthian.org/u/ToFF)\
**Post date:** [February 21, 2026, 9:37pm UTC](https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848/9 "2026-02-21T21:37:55Z")

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For going crazy with bass sounds, I recommend some of the free sfz from [Free samples from Karoryfer – Karoryfer Samples](https://shop.karoryfer.com/pages/free-samples)

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**Author:** ![jlearman](https://discourse.zynthian.org/letter_avatar_proxy/v4/letter/j/a698b9/32.png) [@jlearman](https://discourse.zynthian.org/u/jlearman)\
**Post date:** [February 22, 2026, 9:34pm UTC](https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848/10 "2026-02-22T21:34:19Z")

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Thanks everyone! (I know DSmolkein’s work well, but thanks for the pointer to Karoryfer regardless.)

I’ll see if mods at the ssj7 repo will accept a pull request removing the silence. Do we pull them from there, or is there another copy somewhere?

I opened an issue: [Bug: DeepBass sfz has bad, variable latency baked into the sample files. · Issue #1577 · zynthian/zynthian-issue-tracking · GitHub](https://github.com/zynthian/zynthian-issue-tracking/issues/1577)

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<div class="post-metadata">

**Author:** ![hannesmenzel](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/hannesmenzel/32/13014_2.png) [@hannesmenzel](https://discourse.zynthian.org/u/hannesmenzel)\
**Post date:** [February 24, 2026, 2:37pm UTC](https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848/11 "2026-02-24T14:37:13Z")

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> [@jlearman](#):
>
> Where are the original sources in a Gitub repo?

Just for the sake of completeness: In fact there is a connection in the zynthian repository to the factory soundfont library:

> **[zynthian-data/soundfonts/sfz at oram · zynthian/zynthian-data](https://github.com/zynthian/zynthian-data/tree/oram/soundfonts/sfz)**
>
> Data files for engines (samples, presets, configs, ...) - zynthian/zynthian-data

But it seem to only beeing used to _add_ one file to the otherwise static content which comes with the image. If it would be synced via any github repository, this would certainly be the place.

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<div class="post-metadata">

**Author:** ![jlearman](https://discourse.zynthian.org/letter_avatar_proxy/v4/letter/j/a698b9/32.png) [@jlearman](https://discourse.zynthian.org/u/jlearman)\
**Post date:** [February 24, 2026, 3:35pm UTC](https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848/12 "2026-02-24T15:35:22Z")

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Thanks. But wouldn’t it be better for zynthian to pull from repos than to duplicate them? Or perhaps I misunderstood. Apparently the build process does pull samples from … somewhere. Where would I find the scripts that do that during the build process?

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<div class="post-metadata">

**Author:** ![hannesmenzel](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/hannesmenzel/32/13014_2.png) [@hannesmenzel](https://discourse.zynthian.org/u/hannesmenzel)\
**Post date:** [February 24, 2026, 4:04pm UTC](https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848/13 "2026-02-24T16:04:17Z")

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> [@jlearman](#):
>
> Where would I find the scripts that do that during the build process?

I have no idea, but I suspect it doesn’t pull from anywhere other than a pre curated set which you can visit at the OS image link above.

Many of the scripts might even not be at github elsewhere at all. And if so it might be worth to think about duplicating for further Zynthian specific integration, compatibility with the available engines instead of sforzando and the controller integration scripts.

Maybe, If the developers here have some spare energy at all besides integrating zynbleton, we could discuss it in an extra space?

> [@Factory soundfonts library](https://discourse.zynthian.org/t/factory-soundfonts-library/12854):
>
> Hi, [EDIT:] I try to summarize the discussion on a dedicated [wiki page](https://wiki.zynthian.org/index.php/Refactoring_Zynthians_factory_soundfont_library). I would like to discuss about the factory soundfont library zynthian offers with each provided image. It is indeed already a comprehensive set of sounds which makes much fun to explore. Since @jlearman recently joined the chat and [brought up the question](https://discourse.zynthian.org/t/deepbass-sampleset-has-high-latency-and-id-like-to-fix-it/12848) for the source location for the factory library, it might be worth to ask some questions: Need Is revising the factory library needed? Do enough people use these? Do you…