Month: March 2016

ST4 / Post-kickstarter update

First of all, 20 Sawbench rewards have now shipped out. That means all except the ones in the combined (ST4+Sawbench) rewards. The combined rewards will be sent out as soon as the ST4 is ready. This saves work and postage costs (which are very high). The webshop will start selling Sawbenches again at some point. But we’re running out of stock we’ll probably make a follow-up.

The ST4 development has reached another milestone as earlier on this week the new PCB’s arrived. See the picture below:

– top: IO board (MIDI/USB)
– center left: expansion board (power distribution, DAC’s, SRAM, display, connection with all other boards)
– center right: SD board
– bottom left: mod+env board
– bottom right: vcf/vca controls board

The new ST4 PCB's

The new ST4 PCB’s

Note that the mod board has got sliders for ADSR and ledbuttons to quickly select channel and function (VCO/VCA/VCF/AUX).

Assembly and test will start today. As mentioned before the SMD will be 0805 and SOIC, so relatively big and hence suited for DIY. We like the SMD because it’s cheaper, smaller, and we feel easier to solder than through-hole. However, all control and interface components (pots, sliders, sockets) will remain through-hole, since this is much sturdier!

Furthermore, we’ve contacted the factory for PCBA (PCB Assembly by machine).. Especially for the VCA (~100 components) and VCF boards (200+ components).

Some work on the software has been done. The most glaring bugs were fixed and it seems there are no more crashes now.. But a lot of features need to be implemented, still. After some deliberation it was decided to go ahead with MIDI OUT stuff like unlimited polyphony and cc’s. However, they won’t be there in the first release. More like v1.1 or 1.2. The GUI needs to be completely redesigned (piano roll for the poly stuff and some crazy stacks for the cc’s).

In recent days we also contacted a new designer to do the front plate  and back panel graphics. We’re thinking of a multi-color scheme, if the budget will allow. We’ve also contacted the casing factory about this..

In closing, a lot of activities. But it looks like it’s all coming together.


Rewards and ST4 development

For all the Kickstarter backers and people interested in the ST4.

Last week we sent the first rewards to the backers (first-come first-served): 5 Sawbench kits and 5 assembled ones. This week we made a similar amount and they will hopefully be tested and shipped over the weekend.

Also, for the DIYers, the manual has been enhanced with pictures and tables, which can be used (also by us) to verify if all components are in the bags! Just overlay your stuff to check!


Some good news about the ST4: the noise issues seem solved! The numbers: SNR is now better than 80 dB, in some cases better than 90 (but it should not be more than that, bleh! :)). Even better, the periodic noise issues are completely gone! The entire guts needed to be replaced (going from PWM CV to a multi-channel DAC), but it was worth it.

The envelope section has been redesigned and the new components are already in-house. The new design for the control PCB’s (with envelope controls and such) is almost ready to be taped out. We hope to send those off to the factory in the next week. The new multi-channel CV DAC design will also be taped out at the same time.

When the new control board design is finalized we can also start redesign of the new front plate and contact the factory. We’re currently in discussion with a potential US distributor.

Overall, things seem to be ahead of schedule. We expect to send out all the rewards early summer.

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