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GRN is currently undertaking research into whether we should develop and produce our own solid-state player. Such a player would have no moving parts, and would store the sound as digital data on a memory chip.

What are the benefits of such a player?

One important advantage that a solid-state player has over other technologies, such as cassettes or CDs, is the potential for a longer lifetime with little or no maintenance. There are less components subject to wear, or sensitive to dust, shock etc. It is also generally smaller and requires less power to operate. Being a digital player, it can also potentially deliver higher quality sound than an analogue machine like a cassette player. Also the data can be copied many times with no degradation.

What features would the player have?

There are many features we consider desirable in a solid-state player:

• Re-programmable memory. Flash memory appears to be the best candidate. This could be in the form of removable cards, of which a number of different types are currently available.

• Built-in amplifier and loudspeaker. The player should be able to be used in a small to medium sized group.

• Quality sound. The player should be capable of good quality reproduction of both speech and music.

• Reliability. The ability to withstand harsh conditions and rough treatment is important where these players would be used.

• Simple to operate. The players will be used by a wide range of people and cultures, and must be able to be used by non-literates, tribal people, and anyone who has not had access to technology before.

• Good storage/compression format. The format should be widely available and used. MP3 compression is a good example of this.

• Low power. Able to be used without electricity supplies or disposable batteries.

• Low cost. Vitally important if the player is to be used in large volume and amongst some of the world's poorest people.

Why would GRN develop it's own player?

There are lots of companies manufacturing solid-state players. It is certainly an option for us to use a mass-produced commercial MP3 or similar player.

However, we have not yet found any commercial player that aims at the market we are wanting to serve. Most are intended for technically sophisticated people, with access to computers, the internet, batteries etc, and with a fair amount of money to spend. Poor, non-literate people living in remote, undeveloped places would not be considered a very big or profitable market.

The people at MegaVoice are producing solid-state players that are very simple to use. These players do meet some of our requirements now, and may meet most or all in the future. We are working with MegaVoice on this. Meanwhile, many of our existing audio messages can be used on MegaVoice players.

What areas of research are involved?

Areas that we are currently researching include:

• Circuitry for memory interface, decoding and player control, focusing particularly on MP3 compression.
• Powering options, including rechargeable batteries and hand wind generation.
• Low-power amplification.

Other areas that will need investigation include:

• Acoustic design, loudspeaker driver and enclosure.
• User interface, switches etc.
• Housing.

Get involved!

We want to develop a machine that's going to be as widely useful as possible. To that end, we're gathering information from people involved in cassette and audio ministry. If that's you, then we'd love to hear from you.

Perhaps you have particular expertise or interest in some of these areas. You could be part of the research team, no matter where you are or how much time you have. (Note: we won't pay you!)

If you are interested in being involved, or have some feedback or ideas about this project, or you simply want more information, then contact us now!