tag:blogger.com,1999:blog-20340207.post7497109873211947906..comments2024-03-28T22:24:18.546+00:00Comments on Phil's Workbench: Hornby SupersoundUnknownnoreply@blogger.comBlogger1125tag:blogger.com,1999:blog-20340207.post-72212159107277571372014-04-02T13:14:11.959+00:002014-04-02T13:14:11.959+00:00Thanks for posting this - brings back happy memori...Thanks for posting this - brings back happy memories.<br /><br />Some years back, a local Tandy (remember them?) were selling off a sound chip, with data, so cheap it would have been rude to refuse.<br /><br />I built the application circuit on the datasheet - and had loads of fun altering component values and listening to the sounds.<br /><br /><br />Turning to the ready made versions, most of the sounds were basically various flavours of white noise. I never saw them - but they were almost certainly based around something very similar to the chips available to electronics enthusiasts.<br /><br />As with the DIY versions, exactly what sounds came out could be varied by altering the values of a few external components.<br /><br />Whoever designed these boxes for Hornby would probably have done a lot of playing around - sorry, "serious research" - and made a note of component values that yielded usable sounds. If they were really "serious" about it, they would also have varied these values by a few percent and checked again, to allow for component tolerances.<br /><br />(Any differences between "train" and "car racing" versions could be taken care of at this stage of product development.)<br /><br />It would then have been a simple matter to copy the component values across to production versions of the boxes.Huw Griffithsnoreply@blogger.com