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  • 1-Bit Sound AccuracyI'm hoping someone can give this snapshot a try on a real machine (just press enter to start the music): https://drive.google.com/file/d/0B6XhJJ33xp…

    ... hearing and outside the frequency response of any speaker ... and output at that sample point and then high frequency samples ... are taken again, averaged and output for ... and that causes that pictured frequency response to alias, meaning ...
    Alcoholics Anonymous Alcoholics Anonymous September 2015 Development
  • 1-Bit Sound AccuracyI'm hoping someone can give this snapshot a try on a real machine (just press enter to start the music): https://drive.google.com/file/d/0B6XhJJ33xp…

    ... net.au/~fredm/beeper/Frequency%20Analysis%20Fuse_Triceropop_unfiltered.png[/img ... this is raw emulator output, not recorded from my ... illustrates that the raw output has a pretty flat ... net.au/~fredm/beeper/Frequency%20Analysis%20Fuse_Triceropop_TV_Speaker.png[/ ...
    Fred Fred October 2015 Development
  • 1-Bit Sound AccuracyI'm hoping someone can give this snapshot a try on a real machine (just press enter to start the music): https://drive.google.com/file/d/0B6XhJJ33xp…

    ... did too based on the frequency analysis - RobeeeJay: did I guess ... frequencies of the direct emu output with one from the 48K ...
    RobeeeJay RobeeeJay October 2015 Development
  • 1-Bit Sound AccuracyI'm hoping someone can give this snapshot a try on a real machine (just press enter to start the music): https://drive.google.com/file/d/0B6XhJJ33xp…

    ... generate a frequency sweep and record that from the speaker, mic port ... , and emulators. Then you can directly compare the frequency response ...
    guesser guesser October 2015 Development
  • 1-Bit Sound AccuracyI'm hoping someone can give this snapshot a try on a real machine (just press enter to start the music): https://drive.google.com/file/d/0B6XhJJ33xp…

    ... generate a frequency sweep and record that from the speaker, mic port ...
    Alcoholics Anonymous Alcoholics Anonymous October 2015 Development
  • 1-Bit Sound AccuracyI'm hoping someone can give this snapshot a try on a real machine (just press enter to start the music): https://drive.google.com/file/d/0B6XhJJ33xp…

    ... "]Here is recorded SpecEmu unfilterd output of this beep file:
    And here is the SpecEmu frequency analysis for reference:
    [img ... .iinet.net.au/~fredm/beeper/Frequency%20Analysis%20SpecEmu_beep_test.png[/img]
    Fred Fred October 2015 Development
  • 1-Bit Sound AccuracyI'm hoping someone can give this snapshot a try on a real machine (just press enter to start the music): https://drive.google.com/file/d/0B6XhJJ33xp…

    ... generate a frequency sweep and record that from the speaker, mic port ... , and emulators. Then you can directly compare the frequency response ...
    Fred Fred October 2015 Development
  • Turning on and off internal speaker?Just wondering if this change could be done. Would it be possible to install just a switch so that one could turn on/off the sound coming from the i…

    ... about 2 minutes, as the output capacitors explode from the extra ... no reflected load on the output transformers(not capacitors) primary winding ... Mark re not altering the mic/ear ports characteristics.
    moggy moggy November 2015 Hardware
  • Some downloads fail meI want download the schema of the Spectrum +2A and I can not because appears a user and password request in all links of "SCHEMATICS, MANUALS AND TEC…

    ... modulated (mixed with a carrier frequency by IC10) and then added ... video) with a ultra high frequency (UHF) carrier to replicate the ... 't have a composite video output at this connector. However, if ...
    1024MAK 1024MAK November 2015 Hardware
  • Switched voltage regulatorIn the past a replacement voor the (hot!) 7805 has popped up a couple of times in various threads. As far as I know, Recom Power Inc. was always ment…

    ... ;) ). LM2596 uses a higher switching frequency than the LM2575, which allows ... , where you can set the output voltage with a potentiometer (but ...
    RetroTechie RetroTechie November 2015 Hardware
  • 1-Bit Sound AccuracyI'm hoping someone can give this snapshot a try on a real machine (just press enter to start the music): https://drive.google.com/file/d/0B6XhJJ33xp…

    ... bet is to go by MIC port output, then derive the "beeper ... " output from that. Even with that, ...
    utz utz December 2015 Development
  • May the "How to do it" bullet pointing commence!"You Tube" does not cover everything ZX Spectrum realted There are now so many ways to use ZX Spectrum related stuff. And therefore therefore ther…

    ... standardised defined level, as the output level depends on the volume ... another value/type.

    Mic / microphone inputs are only designed ...
    1024MAK 1024MAK December 2015 Games
  • Jiiira's Sparrow LITEHi All, Just for info .. :) big eprom, cheap 32KB ram and etc. i don't know specification .. :) https://youtu.be/NbI7E1aebrM modern speccy .. …

    ... />
    don't like:
    mic/ear plugs are stereo and ... improvements:


    - video output is now the Composite video ...
    gorski gorski December 2015 Hardware
  • Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…

    ... play with a phone headphone output and it is definitely better ... the tape sound through the MIC socket? I love being able ...
    kenwonders kenwonders February 2016 Hardware
  • Recommend Cassette PlayerI've not needed to buy one for about 30 years so can anyone recommend a new cassette recorder and source please? Do they even make them anymore?

    ... mix of RF (radio frequency) chokes and RF transformers. ... output of the "local" oscillator to produce the intermediate frequency ... earlier). From this intermediate frequency signal, the audio signal ... to remove the radio intermediate frequency) and then the audio ...
    1024MAK 1024MAK April 2016 Hardware
  • New Game: Deep Core RaiderAlong with my new website, I finally got round to finishing this old game. [img]http://www.thespectrumshow.co.uk/css/images/screens/dcr1-big.png[/…

    I seem to be doing this a lot recently (not complaining, keeps the old artistic juices flowing, plus the frequency of my output indicates an abundance of games being released), but if you need a cassette cover designed, give us a shout.
    The Lone Magpie The Lone Magpie April 2016 Brand new software
  • So for my first trick...I'm sure people have already used the AD724 or AD725 on other 8 bit machines, and i know the Harlequin uses the 724, but not seen anyone trying to us…

    ... or not

    * The output from the RGB socket on ... useful that the 4FSC PAL frequency is the same 17.7345MHz ... frequency that the ULA uses as ...
    Peter Mulholland Peter Mulholland April 2016 Hardware
  • SpecNextThis looks interesting... http://www.specnext.com/

    ... FM2149 chips (selectable) with stereo output
    DB9 Joystick with IF1 ... )
    PS/2 port
    Mic & ear sockets
    Original ...
    Strident Strident April 2016 Sinclair Miscellaneous
  • Modifying Commodore datacorder's for Speccy use. Is it possible?Just wondering if it's possible to modify a Commodore datacorder for use with the Speccy, or if anyone has. My assumption is the output and input on …

    ...
    orange - ground
    brown - MIC
    white - EAR
    red ... to boost the line level output. May go for one of ... chassis mount sockets for ear,mic, and power connections. Again if ...
    Your Spec-chum Your Spec-chum May 2016 Hardware
  • What's the best solution for audio loading on a 48k?I have three 48k Speccies. All have been recapped and AV modded, but only one (an issue 4A) is currently loading via Teezix. (the other two (issue 3…

    ... stereo(2 channels) output. Spectrum's EAR & MIC sockets are mono ... a device with a stereo output, it will short the right ... amplifier and reduce it's output, and could damage the device ...
    Your Spec-chum Your Spec-chum May 2016 Hardware
  • ZX-Uno moddingStarting with ZX-Uno case modding I have not yet received my ZX-Uno yet (it is in the post) but I know that I will have to do at least one mod …

    ... younger :))

    The video output on unmodified ZX Spectrum 16k ... mixing in a ultra high frequency carrier frequency.

    Most modern ... that has a Composite Video output to a TV that has ...
    1024MAK 1024MAK June 2016 Hardware
  • A focus on old TVs for 48k spectrums The old 48k Spectrum is becoming harder to use "display wise" in its original state. This thread is about retaining originality and not going down …

    As the video signal frequency differs a factor 30 from ... the UHF frequency, it is quite well possible ... separate both signals 'over the output impedance'. Separating is done by ... the modulator and the CINCH output connector of the modulator. No ...
    roko roko July 2016 Hardware
  • ZX-Uno moddingStarting with ZX-Uno case modding I have not yet received my ZX-Uno yet (it is in the post) but I know that I will have to do at least one mod …

    ... VIDEO option
    3)The frequency option is another 2 keypresses ... Have configured the VGA output at a frequency That does not allow ... procedure can be applied for frequency, though the above may ... to position ourselves in the Frequency option
    Enter to ...
    andydansby andydansby July 2016 Hardware
  • Help needed with MIA software with custom (?) loaderHi, I've got into my hands recently a bunch of Polish educational software which are unknown MIA on WOS. I believe they are protected with some…

    ... back to S0 to output next pilot pulse
    MIC on
    0xEAA4 SCF ... 0xEAE2 LD A,0F ; MIC on + border white (ROM ... OUT (FE),A ; Set MIC/Border (ROM)
    0xEAE6 ...
    lfaria lfaria August 2016 MIA/STP/SDP
  • 128k toastrack board changesI was working on my spectrums this weekend and opened up my toast rack to look at the possibility of changing out the Electrolytic caps. I was awar…

    ... to the HF output socket on the modulator. The Mic socket is ... don't use the HF output, or are happy picking up ... the sound from the Mic socket, there is no need ...
    1024MAK 1024MAK September 2016 Hardware
  • Spectrum +2 (grey): Mod- and operation- related advices needed.Dear Sirs and Ladies, Please welcome a newbie to the “World of Spectrum” (both to the forum and, well, metaphorically). I’ve recently purchased a…

    [quote="ingo;879419"]MIC line is directly connected to ... ]

    The MIC pin is the output, don't connect anything ...
    guesser guesser September 2016 Hardware
  • Help a new user pleaseI love old school games and never had a Sinclair as a kid so thought I would rectify that via eBay! I have a 48k+ Model that was sold as working, …

    ... and trying it via the mic socket too, all to no ... "]I have a really crappy mic that I have put in ... getting nothing.[/quote]
    The output signal from microphones is very ...
    1024MAK 1024MAK September 2016 Hardware
  • ZX Spectrum 128K Toastrack - Quiet AY audio, beeper loudHi, I've got a 128K toastrack Spectrum using a RGB + MIC audio to SCART cable but I'm finding the AY is a lot quieter than the Beeper. Is there an…

    No, R115 only affects the AY sound output from the Mic socket. It will not affect the sound on the RF output.

    [b][i]Mark[/i][/b]
    1024MAK 1024MAK October 2016 Hardware
  • 'computer compatible' tape recorders?I have seen these a couple of times for sale, but what exactly do they do (differently form the regular type) ? [URL=http://s1063.photobucket.com/…

    ... from a computer (the output from a computers mic socket), generally you ...
    1024MAK 1024MAK November 2016 Hardware
  • Why do we have to live with colour clash on the Spectrum Next - if it ever gets sold!I can fully sympathize with those who would like to see a 'new' Spectrum, presumably modelled on the last and best version with perhaps the option to…

    ... modes and colours
    Video Output: RGB, VGA, mini HDMI
    output
    Joystick: DB9 compatible with ... , cheats etc.
    Tape support: Mic and Ear ports for tape ...
    BiNMaN BiNMaN November 2016 Chit chat
<1…18192021222324…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
  • European Software Titles with an English version
    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
    harriusherbartio on April 21
  • +3 Disk drive motor
    AndyC on April 21
  • Celebrity deaths...
    mel the bell on April 20

HitBox

Word Docs Hits
mic 1.6K 2.1K
output 9K 13.1K
frequency 1.6K 2.3K

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