Nielso<p>„I have this old keyboard. You can have it. It has these digital sounds we were into back then because we were fed up with the 70ties. It needs a new battery.”</p><p>After learning that the guy was talking about his old <a href="https://digitalcourage.social/tags/Ensoniq" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Ensoniq</span></a> <a href="https://digitalcourage.social/tags/ESQ1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ESQ1</span></a>, I said yes without even looking at it. It was made almost 40 years ago. It has 8bit <a href="https://digitalcourage.social/tags/wavetable" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>wavetable</span></a> oscillators and analog Curtis filters.</p><p>As with old cars with a flat tire, you soon notice that the tire is not big problem at all… somebody had replaced the pcb-mounted battery by one floating around in there, being easier to replace. I ordered a replacement part.</p><p>It turned out, that most of the keys didn't work any more. Luckily the keyboard is a very simple construction. So I inhaled a lot of Kontakt60 vapours, and while I was at it removed the nicotine residues from everything using alcohol… until I got a bad headache.</p><p>Does anybodyknow if I can upgrade the <a href="https://digitalcourage.social/tags/firmware" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>firmware</span></a> of this <a href="https://digitalcourage.social/tags/synthesizer" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>synthesizer</span></a> using the version 3.5 chips available from Ebay? Or does it depend on PCB bord revisions?</p>