# Voice of Seren

The Voice of Seren is a blessing effect in Prifddinas, moving between clan districts every hour. Two clans will have the Voice active at any given time. While the Voice is active in a clan's district, certain actions related to that clan's signature skills give additional experience or rewards.

The clans that are receiving the Voice are the same in all worlds. Elven clan capes can be right-clicked to tell whether the Voice is currently active in that clan's district. The Master clan cape can be right-clicked to do the same, but will tell the clans districts for which the Voice is currently active in.

When in Prifddinas, two clan icons are visible on the screen depicting the clans that are illuminated by the Voice of Seren. Since 6 July 2015 one can also hover over these icons to see some of the effects for that clan when it is illuminated. Near the lodestone in the Tower of Voices, the player is able to see which districts the voice is active in by looking at the illuminated symbols on the ground. The clan symbols on the ground indicate the direction where each clan district is located.

Inside Prifddinas, the following message is shown when the Voice of Seren changes districts. The colour depends on which district is mentioned.

Clan Message
Amlodd The Voice of Seren is now active in the Amlodd district.
Cadarn The Voice of Seren is now active in the Cadarn district.
Crwys The Voice of Seren is now active in the Crwys district.
Hefin The Voice of Seren is now active in the Hefin district.
Iorwerth The Voice of Seren is now active in the Iorwerth district.
Ithell The Voice of Seren is now active in the Ithell district.
Meilyr The Voice of Seren is now active in the Meilyr district.
Trahaearn The Voice of Seren is now active in the Trahaearn district.

## Randomness of the voice

The Voice of Seren rotates in a somewhat random way with some key restrictions. If a Voice is active in a clan, then there will be a two hour cool-down on that clan having the Voice of Seren again. For example, if the Voice of Seren is on Trahaearn from 02:00-03:00 then the earliest hour the Voice of Seren can be on Trahaearn again is 05:00-06:00.

This means that at the beginning of any hour there are four clans that cannot have the voice on them. Of the remaining four clans that can have the voice, two will be chosen. That being the case, if the Voice of Seren just ended for a clan, there is a 50% chance it will be active for that clan again in exactly two hours.

In this way, if the Voice of Seren just ended for a clan, one can use the 2 hour cool-down to predict the time at which the Voice will be active for that clan again. A good way to check this is with Jagex's Clock on their Twitter page.

After any game update, the Voice can be of any combination, regardless of the voices prior to the update.

## Known effects

Icon Clan Effects
N/A All clans
• 20% extra base experience from pickpocketing the respective workers.
• An increased chance to find Golden rocks in the respective clan's skill.
• A chance for a crystal impling to spawn at the herald of one of the affected clans (this can happen multiple times during the illumination).
Amlodd
Crwys
Hefin
Iorwerth
Ithell
• 20% more base Crafting and Construction XP from training using the harps. The harps have a significantly lower chance of losing tune while playing.
• 20% more base Crafting XP from crafting crystal flasks.
• Sawmill operator shop stock doubles. It will replenish if it is empty when voice takes effect.
• 50% chance for each mined soft clay to be transported directly to the player's bank. This effect takes precedence over a sign of the porter (if the player is wearing one).
Meilyr
Trahaearn
• 20% more Smithing XP when smelting corrupted ore.
• At the start of the hour, each ore rock, excluding gem rocks, has a 1/15 chance of being replaced by a dark or light animica rock. The replaced rock will remain in the world until the end of the hour.
• 20% chance to award extra ore when mining rocks in the district.
• 20% more base Farming XP from planting and checking the tree patch, as well as a chance of the tree skipping growth stages.

## Update history

The update history project is a work-in-progress - not all updates to this topic may be covered below. See here for how to help out!
• patch 11 March 2019 (Update):
• The Voice of Seren icons can once again be clicked through on Desktop; when on mobile, players are shown the information for the buff tapped.
• patch 7 January 2019 (Update):
• Trahaearn hour causes random level 90 animica rocks to spawn on each world, requiring worlds to be searched for a good pattern. In addition all mining has a higher chance for double ore, and smelting corrupted ore gives more XP.
• Ithell hour now gives a chance for soft clay mined to be put straight into the bank.

## Trivia

• An unlisted music track similar to Elven Voice plays throughout the active clans' districts of the city while the Voice is in effect there.
• After the release of Prifddinas, the Voice of Seren gave 20% experience boost for all the clan-related skills performed under the Voice of Seren. This was reduced for some actions to 5% when the second half of the city was released and turned to the current state on 17 November 2014. On the official forums it was told that this wouldn't happen until the first week of December.[1] This was reverted early in January 2015.
• There are 28 states for the pair of clans for a single given hour (8 choose 2). The possibilities for a given hour depend only on the previous two hours, so the Voice of Seren rotation can be interpreted as a Markov chain with 28 states and order 2. Alternatively, the state space can be defined as the set of possible states for two consecutive hours. The number of such states is 420, or 8 choose 2 times 6 choose 2. In this case, the distribution of states for a certain pair of two consecutive hours, such as 05:00 and 06:00, only depends on the state of "the previous consecutive hours," meaning 04:00 and 05:00. In other words, this is a Markov chain on 420 states with order 1. A Markov chain with order 1 is completely characterized by its transition matrix (whose dimension is n by n, where n is the number of states, 420 in this case). The mixing time (a concept which roughly means rate of stabilization) of an order-1 Markov chain is strongly related to the eigenvalues of its transition matrix, in particular, their absolute values. Based on numerical computations and rounding the computed eigenvalues to round values, the 36 largest absolute values of the 420 eigenvalues, in descending order, are exactly 1, ${\displaystyle {\sqrt {1/2}}}$ 14 times, and ${\displaystyle (1/2)}$ 21 times. If one stops distinguishing seven of the clans (e.g. considering all clans which aren't Hefin the same), then the 420-state order-1 Markov chain becomes a 3-state order-1 Markov chain with absolute eigenvalues 1, ${\displaystyle {\sqrt {1/2}}}$, ${\displaystyle {\sqrt {1/2}}}$. In particular, the second-largest absolute value of both chains are only ${\displaystyle {\sqrt {1/2}}}$, which suggests that this Markov chain has a surprisingly low mixing time because the clans don't interfere with each other's mixing, and it also suggests a more general fact about Markov chains of this type.
• For quite some time, there was a common misconception that when the Iorwerth Clan district was illuminated by the Voice of Seren, this had an effect on the crystal chest drop table; this was confirmed to be incorrect by Mod Hunter [2].

## References

1. ^ Mod Osborne. "Voice of Seren - Quick Note." 10 November 2014. Recent Game Updates Forums.
2. ^ Mod Hunter. 10K crystal chests VoS vs. no VoS. "If nothing else all of your testing has at least gained mod confirmation that there isn't - and has never been - any impact from the VoS on the crystal chest. I've had a look at the original elf city design documents put out to players as well as internal documents and didn't find anything mentioning it as an intended feature. Most other searching loops back to runewiki as a source, so I would be interested to learn where the belief it had an effect originated!"