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Band-in-a-Box for Windows
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Since I got BIAB 2026 in December 2025 my Calkwalk TTS-1 basically made no sound. I found the solution to my problem today by doing STEP 1 of the following list of TTS-1 within BIAB Troubleshooting steps. Now I can use my TTS-1 as my default GM Synth in Band-in-Box!

1. Re-register the TTS-1 DLL (Most Likely Solution)
TTS-1 often stops working because its registration is lost. You need to manually register the file. • Close Band-in-a-Box.
• Open the Windows Command Prompt as Administrator (Search for "cmd", right-click, "Run as Administrator").
• Type the following command and press Enter:
regsvr32 "C:\Program Files\Cakewalk\Shared DXi\TTS-1\TTS-1.dll"
• Note: If you have a 32-bit Windows system, the path might be Program Files (x86).
• Restart Band-in-a-Box.
[
**STEP 1 JUST ABOVE WAS APPLIED AND IT WORKED PERFECTLY! NOW THE SOUND PLAYBACK WITH THE CAKEWALK TTS-1 IS FINE! --Peter Hewer**]

2. Verify DXi/VST Settings in BIAB
Band-in-a-Box must be configured to use DXi instruments properly.
• Go to Options > MIDI/Audio Driver Setup in Band-in-a-Box.
• Ensure Use DXi/VSTi Synth is checked.
• Click [DXi Synth Settings].
• Select Cakewalk TTS-1 from the list of available synths.
• Ensure no other MIDI driver is causing a conflict (e.g., try setting MIDI Output to "None" if you are only using the DXi).
3. Reinstall BandLab Cakewalk (Fixes Missing Files)
If you recently installed or updated BandLab Cakewalk, it may have damaged the shared TTS-1 files. Reinstalling the DAW usually restores it.
• Open the BandLab Assistant, go to the Apps tab, and choose to Install (or Reinstall) Cakewalk by BandLab.
• During installation, ensure the "TTS-1" or "Shared Plugins" option is checked.
• After installation, restart your computer and try loading BIAB again.
4. Delete the Plugin Cache File
If BIAB is trying to load a broken reference to the plugin, it will fail.
• Close Band-in-a-Box.
• Go to your bb folder (usually C:\bb or C:\Program Files (x86)\PG Music\Band-in-a-Box).
• Locate the file DXiPluginList.ini and delete it.
• Restart Band-in-a-Box. It will rebuild the plugin list, which often fixes the issue.
5. Check Sample Rate (Audio Sync Issues)
If the TTS-1 opens but makes no sound, it may be a sample rate mismatch.
• Ensure your Windows sound settings and Band-in-a-Box are both set to 44100 Hz (16 or 24-bit).
• In Windows, go to Control Panel > Sound > Playback > Properties > Advanced and set it to 44100 Hz.

Band-in-a-Box for Windows
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Peter, thanks for the detail, and this might really help others.

Perhaps consider posting this in the User Tips and Tricks section of these forums?


BIAB & RB2026 Win.(Audiophile), Windows 10 Pro & Windows 11, Cakewalk Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Session Keys Grand S & Electric R, Kontakt, Focusrite 18i20, KetronSD2, NS40M, Pioneer Active Monitors.
Band-in-a-Box for Windows
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Hi Peter,
Thanks for sharing these TTS-1 troubleshooting steps. As a member of both this forum and the Cakewalk forum I don't recall ever seeing such a concise but complete list in one post.
Did you compile the list from one source? If so do you have a link to the original post?


Jim Fogle - 2026 BiaB (Build 1224) RB (Build 8) - Ultra+ PAK
DAWs: Cakewalk Sonar - Standalone: Zoom MRS-8
Desktop: i7 Win 11, 12GB ram 256GB SSD, 4 TB HDD
Music at: https://fogle622.wix.com/fogle622-audio-home
Band-in-a-Box for Windows
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Thanks so much for posting this. It's very helpful and deserves to be a sticky in the "Hints" groups.

Jeff


Win11, Intel i7 7700K 4.2Ghz, 32Gb RAM, 2x1Tb HD, 500Gb NVMe, BIAB/RB 2026, MOTU 828MK3 audio, MOTU Midi Express, Yamaha Montage 7, DX7II, TX802, Motif XS Rack, Roland Fantom XR Rack, Oberheim Matrix 1000, VoiceLive3 Extreme, Kontakt 6, SampleTank 4.3
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