Make this my favourite Brand New Sinclair ZX81 MrX AY Sound Interface

Retro Computers >> Sinclair >> Sinclair ZX81 >> Hardware >> General / Add-Ons
Listing type:
Fixed Price Multiple Items
Item Condition:
Seller location:
Stoke-on-Trent, Staffordshire, United Kingdom
Ending in:
This listing is closed (28/01/2017)

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Latest buyer:
S***s (21)
Fixed price:
Shipping Costs:
From only £5.04
Payment methods:
Paypal, Bank transfer
Number Sold:
13 (View history)
Buyer Value Date and hour Quantity bought
S***s (21) £38.00 28/01/2017 17:14:58 1
k***f (24) £38.00 28/01/2017 08:28:48 1
s***i (2) £38.00 19/10/2015 19:48:52 1
7***s (11) £76.00 16/10/2015 22:31:29 2
M***J (15) £38.00 09/09/2015 10:35:53 1
t***d (1) £38.00 23/04/2015 14:57:56 1
i***2 (11) £38.00 08/09/2014 20:31:54 1
w***h (14) £38.00 31/08/2013 16:24:43 1
m***c (9) £38.00 08/07/2013 09:53:40 1
S***t (16) £38.00 20/07/2012 15:07:04 1
a***i (23) £38.00 25/06/2012 23:59:45 1
1***K (124) £38.00 25/05/2012 01:50:22 1
Feedback on this Item
PositivePositive s***i (2) Brilliant item super quality 16/11/2015 20:47:55
PositivePositive 7***s (11) Perfect and quick ! 23/10/2015 21:41:40
PositivePositive w***h (14) MrX AY Sound works well, to be recommended - fast shipment - A+++++ Seller! 21/09/2013 14:12:10
PositivePositive S***t (16) Excellent item, fantastic seller! 26/11/2012 03:50:07
PositivePositive 1***K (124) Quick & excellent service. Item is as described. A pleasure to do business with. 30/09/2012 15:05:22

Item Number : 2268

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This is the MrX AY-Sound Interface for the Sinclair ZX81 Home Computer.
Manufactured in 2012, this sound interface is a full Zon-X compatible AY sound interface for the Sinclair ZX81, and Timex-Sinclair TS/1000, TS/1500 Home Computers which plugs into the expansion port to provide the computer with AY sound output.

The MrX AY-Sound Interface comes complete with a full Yamaha YM1249 sound chip (equivalent to the AY-3-8910) and ahas a through port if you wish to use it alongside other interfaces (such as our own ZXpand).

Files can be converted using MIDI2AY and then using a custom ZX81 player.

LATEST NEWS: You can now obtain a new GAL for the MrX Sound interface, which allows you to combine it with the ZXpand plus ZXpand-AY module (or a second MrX sound module using the original GAL), to provide 6 channel stereo output sound (Turbo-AY) sound on the ZX81 - such as can be heard from:

-- Buy with confidence from RWAP Software - supporting Sinclairs since 1986 --

Various pieces of software have been released to help the ZX81 play sounds using AY Sound interfaces, and also to help design sounds for use with games and other software.

  • The AY Sound Design Tool - this allows you to set the frequency, volume and mixing (tone and noise) for each of the three channels to create noises for use within programs.
  • The ZXpand Sound Player - simply copy AY files (PT3 format files) into a directory on the ZXpand, and then run a short program to select and play each tune. 
  • The ZX81 STC Sound Player - program to play STC format files on the ZX81
  • The ZX81 Sound Tracker - music editor and tracker
  • The ZX81 Sound Engine - for playing sounds direct to the AY interface, using BASIC

NOTE: STC can be edited and PT3 files can be created from other sound files, using Vortex Tracker II for Windows.  A good tutorial for using Vortex Tracker II appears at:


The Manual for the MrX Sound Interface can be downloaded from

The upgraded GAL to allow 6 channel sound appears at:

Questions and Answers

Shipping and Payment

Item Location:
Stoke-on-Trent, Staffordshire, United Kingdom
Shipping conditions:
Buyer pays shipping expenses
Shipment fee:
  • To United Kingdom :
  • First Class Post : £5.04 For initial item, £1.08 Per additional item
  • To EU :
  • Airmail Post : £7.80 For initial item, £1.74 Per additional item
  • To Europe (Non EU) :
  • Airmail Post : £6.60 For initial item, £1.74 Per additional item
  • To Americas :
  • Airmail Post : £10.80 For initial item, £2.28 Per additional item
  • To Rest of World :
  • Airmail Post : £12.00 For initial item, £2.28 Per additional item
Shipment terms:
Items normally shipped within 1 working day of payment being received.

We are happy to combine orders in order to reduce overall shipping costs where practical
Payment methods:
Paypal, Bank transfer

Seller: Rich Mellor t/as RWAP Software 3 Dale View Court Fulford, Stoke-on-Trent, Staffordshire, ST11 9BA, United Kingdom
All prices and shipping include VAT at 20.00% where applicable
VAT Number: GB326034531

The seller accepts all responsibility for this listing

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